Amplifier

About The Product1. Mini passive stereo mixer is a stereo four-way passive mixer for extended control tuning, mixing instrument, CD player, tape player, computer, mobile phone, tablet and so on. No battery or other power source required. The device can also be used as 1 In 4 Out stereo distributor clockwise to adjust the volume. 2. OUTPUT: is used to connect RCA jack to mixer output or other output devices. 3. IN 1-4: controls the signal level from input 1-4. 4. 4 groups of stereo RCA input and 1 group of stereo RCA output. 5. Four independently regulated 100K ohms potentiometers.Feature1. Input impedance: 10K ohms to 47K ohms 2. Output impedance: 2.5K ohms to 10K ohms 3. Gain: -12dB MAX

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About The Product1. 6 port stereo speaker selector amplifier switch switcher 2. The speaker switcher allows the user to connect multiple pairs of speakers to a single stereo receiver or amplifier or vice versa to multiple amplifiers/receivers of a single speaker pair. 3. The device has a convenient button terminal that can accept up to 12 AWG speaker lines. 4. Note: this speaker switch does not allow multiple speaker pairs to be selected simultaneously. Only one pair of outputs can be selected at a time. 5. This speaker selection can also be used in the opposite way, imagine having multiple amplifiers connected to a speaker pair for setting. Because each stereo amplifier has its own sound characteristics, the user can connect different power amplifiers to the switch and then output to the same speaker pair. 6. Connect multiple speakers to an audio amplifier/receiver as loudspeakers to select a pair of speakers at a time. 7. Connect multiple amplifiers/receivers to a pair of speakers as an amplifier selection to select one amplifier/receiver. 8. The high-current amplifier protection circuit allows up to 6 pairs of speakers to be connected without damaging the amplifier. The protection circuit can safely protect unselected amplifiers or loudspeakers. 9. Select each time with a manual button on the front panel. Independent left/right channel grounding path, are compatible with all stereo amplifiers.Features1. Use convenient button terminal, can accept up to 12 AWG loudspeaker wires. 2. Supports up to 100 watts of amplifier power and 4 to 16 ohms of all types of speakers. 3. Sturdy, luxurious steel metal case and good shielding. 4. Independent left and right channel grounding path-in-type push-in terminal. 5. No external power supply is required. 6. Rated power: 100 watts per channel.

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About The Product1. Do you have a line level source (TV audio, MP3 player, video game, phone, tablet, computer, record player, etc.) just the sound is not loud enough / the volume is not loud enough? A powerful signal amplifier receiver or volume control just to match your other sources? Or you may need to run a long line between the TV audio line and the receiver on the other side of the room, providing high gain through any line level source, allowing longer cable runs or requiring "buffering"to solve low capacity problem. You can use it to add volume controls between the line level signal source and the power amplifier, and the RCA jack matches almost all other product interfaces. 2. In the aspect of controlling the sound quality amplification of the signal, it can raise the sound and the bottom noise is small, and the dynamic range will not produce the sonic boom. The output volume is controlled by the sensitivity adjusting knob. The output part of the headphone hole at the front end of the product can drive 16 ohm -600 ohm headset. The sound quality is without loss and distortion. The circuit part of the product adopts OP + BUG structure and uses AC 9V transformer to supply power to ensure full thrust, sound fullness, bass calm, high frequency clarity.Features1. Input impedance: 100K Ohm 2. Maximum input level: 14 dBV 3. Output impedance: 47 Ohm per output channel 4. Frequency response: 20 Hz -20K Hz 5. Signal to noise ratio: > 107dB 6. Total harmonic distortion: < 0.08% 7. Intermodulation distortion: < 0.01% 8. Input port: stereo 3.5mm jack and RCA 9. Output port: input port: stereo 3.5mm jack and RCA 10. Product power supply: AC 9V

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1. Capacitor microphone accessories, 48V phantom power supply. 2. Compact and all-metal. 3. One input and one output 3P balanced interface. 4. External transformer to reduce power noise. Package include: 1 x Phantom power 1 x AC power adapter

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Product function introductionA977 passive preamp active speaker volume dual-channel controller is small in size and suitable for active speakers or preamp/post-amp, it supports full-balance or input and output of single-ended signal. The product has functions of independent L/R channel volume adjustment, 2 signals input and 2 signals output. It provides balanced XLR and unbalanced RCA connectors which are automatically converted to each other, with a selector switch facilitates the signal switch of input/output.Small size, big intelligence. The product is of small size, but has well-function connecters. It is suitable for decoders and speakers without volume adjustment. the product has the design of balanced input/output and RCA input/output architecture, with switching function. The operation of the product will not cause loss of signal source. Generally, the audio signal released from the decoder is the original sound source signal. Great dynamics will not cause loss of sound quality, retaining the complete original signal source.Product parametersInput/output impedance: 10KΩ - 50KΩ2 in 2 out switchover, unbalanced RCA connector and balanced XRL connector for input/outputInput: unbalanced RCA connector / balanced XLR connector (convert selection)Output: unbalanced RCA connector / balanced XLR connector (convert selection)Product net weight: 0.32 kgProduct package weight: 0.42 kgProduct dimensions: length 145mm X width 65mm X height 43mmPackaging dimensions: length 200mm X width 180mm X height 55mmKit list1 X A977 2 In and 3 Out Switcher Full-balance Passive Preamp Active Speaker Double Sound Source Volume Controller

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Product function introduction 1. The B981 is a powerful 8-channel high-power pre-amplifier which has dual-sound input with a selector switch. 2. The product provides an independent 3.5mm stereo earphone jack which can drive a variety of high-impedance professional monitor earphones well. 3. Each channel can drive 16ohm -600 ohm and provide 8 stereo channels for output. 4. There are four independent volume knob adjustments to control the 8-channel for simultaneous level signal output, presenting the rich sound quality, well-balanced bass, clear high frequency, and no other signal popping phenomenon, and ensuring lossless and undistributed sound. 5. It can provide +20dB high gain through any line level signal source, allowing running through longer cable lines or "buffering" to solve low volume problems. 6. You can use the product to connect line level signal source and power amplifier as a volume controller. 7. The RCA socket can match almost all other product interfaces. The product is powered by an AC AC9V transformer. Product parameters 1. Input impedance: 100K Ohm 2. Input level: +14 dBV 3. Output impedance: 47 Ohm per output channel 4. Frequency response: 20 Hz - 20K Hz 5. Signal to noise ratio: Above 107dB 6. Total harmonic distortion: Less than 0.08% 7. Inter-modulation distortion: Less than 0.01% 8. Signal input: Two sets of stereo RCA socket 9. Signal output: Six sets of stereo RCA connectors and two sets of 3.5mm stereo earphone jack 10. Product power supply: AC 9V-12V 11. 4 independent channel stereo level volume output controlling knobs 12. Product net weight: 0.68kg 13. Packaged product weight: 0.82g 15. Product dimensions: Length 145mm x width 112mm x height 42mm 16. Packing dimensions: Length 260mm x width 185mm x height 65mm Kit list 1. B981 Professional 8-channel preamp signal-amplifier speaker distributor x 1 2. AC9V Power adapter (US standard) line length 100CM x 1

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【Product Details】"No-Hum AC Hum EliminatorEasy to Use, just Plug it In!Small and Light, Very PortableLED IndicatorSuitable for use on 120V 60Hz grounded USA-style power outletsThe No-Hum is specifically designed to eliminate ground-related Humand Buzz issues, quickly and easily.Simply plug it in, and it filters low voltage from the ground line that causes audio ground loop hum and buzz! Note that the Hum maintains a SAFE ground --NOT a ground lift! The No-Hum does not manipulate voltage in any way,and will not affect sonic quality of audio gear.The No-Hum is not designed to solve cable or pickup related noise.Simply place the No-Hum on the power cord of offending equipment to get ridof hum and buzz. A built-in LED indicator shows that the No-Hum is working.The No-Hum is suitable for use on equipment up to but not exceeding 6 amps of current draw." 【Product features】No-Hum AC Hum EliminatorEasy to Use, just Plug it In!Small and Light, Very PortableLED IndicatorSuitable for use on 120V 60Hz grounded USA-style power outletsProduct net weight: 0.18 kgProduct weight after packing: 0.23kgProduct size: length:80mm X width:44mm X height:32mmPacking size: length:90mm X width:82mm X Height:57mm 【Packing list】 1 X B983—AC ground circuit buzz eliminator

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product description【Product Details】personal in-ear monitor amplifier，in-ear monitor amplifier for personal monitor applications，high power and "drummer proof" headphones output，dual XLR inputs allow for 2-channel mono or stereo operation，switchable stereo/mono operation with mix function，level and balance/mix controls，runs up to 12 hours on a 9V battery(not included)，battery control with dual LED indicators，operates on DC 9V power supply (included)，integrated current limit protects your ears and headphone。【Product features】Input：2 X XLR connector,balancedOutput：6.35mm and 3.5mm TRS connectorInput impedance：20K ohmOutput impedance：10K ohm per channelFrequency response：20 Hz-80K Hz(+/-0.5 dB)THD + N：0.01%Signal-to-noise ratio：>90 dB(A-weighted)CMRR：>50 dBCrosstalk：>40dBSystem DataNormal input level：2 dBuMax input level：6 dBuLimit input level：7 dBuMax output level：9.5 dBuIndicatorsLEDs：power indicator(green)，battery control indicator(red)Voltage：Green LED lit：voltage>7.3V，Both green and red LED lit：voltage = 6.8-7.3V，Red LED lit：voltage<6.8VBattery：9V block alkaline or 8.4V NIMH rechargeable batteryPower adapter：Ext.input power DC 9V (pin = pos，ring = neg)Standby power consumption：300 mWMax operation current：90 mAMax output power into 20 ohm：40 mW per channelProduct net weight: 0.32 kgProduct weight after packing: 0.48kgProduct size: length:105mm X width:103mm X height:43mmPacking size: length:200mm X width:180mm X Height:55mm【Packing list】1 X B982 Power amplifier instrument drummer earphone monitor amplifier

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Product Details The B981 is a powerful 8-channel high-power preamplifier which has dual-sound input with a selector switch. The product provides an independent 3.5mm stereo earphone jack which can drive a variety of high-impedance professional monitor earphones. Each channel can drive 16Ohm-600Ohm and provide 8 stereo channels for output. There are four independent volume knob adjustments to control the 8-channel for simultaneous level signal output, presenting the rich sound quality, well-balanced bass, clear high frequency, and no other signal popping phenomenon, and ensuring lossless and undistorted sound. It can provide +20dB high gain through any line level signal source, allowing running through longer cable lines or "buffering" to solve low volume problems. You can use the product to connect line level signal source and power amplifier as a volume controller. The RCA socket can match almost all other product interfaces. The product is powered by an AC AC9V transformer. Specification 1. Input impedance: 100K Ohm 2. Input level: +14 dBV 3. Output impedance: 47 Ohm per output channel 4. Frequency response: 20 Hz - 20K Hz 5. Signal to noise ratio: Above 107dB 6. Total harmonic distortion: Less than 0.08% 7. Intermodulation distortion: Less than 0.01% 8. Signal input: two sets of stereo RCA socket 9. Signal output: six sets of stereo RCA connectors and two sets of 3.5mm stereo earphone jack 10. Product power supply: AC9V-12V 11. 4 independent channel stereo level volume output controlling knobs 12. Product net weight: 0.68kg 13. Product dimensions: length 145mm x width 112mm x height 42mm Package List 1. B981 Professional 8-channel preamp signal-amplifier speaker distributor x 1 2. AC 9V Power adapter (US standard) cable length 100CM x 1

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Product DetailsPersonal in-ear monitor amplifier, in-ear monitor amplifier for personal monitor applications，high power and "drummer proof" headphones output, dual XLR inputs allow for 2-channel mono or stereo operation, switchable stereo/mono operation with mix function, level and balance/mix controls, runs up to 12 hours on a 9V battery(not included), battery control with dual LED indicators, operates on DC 9V power supply (included), integrated current limit protects your ears and headphone. Specification1. Input: 2 x XLR connector,balanced2. Output: 6.35mm and 3.5mm TRS connector3. Input impedance: 20K ohm4. Output impedance: 10K ohm per channel5. Frequency response: 20 Hz-80K Hz(+/-0.5 dB)6. THD + N: 0.01%7. Signal-to-noise ratio: >90 dB(A-weighted)8. CMRR: >50 dB9. Crosstalk: >40dB10. System Data- Normal input level: 2 dBu- Max input level: 6 dBu- Limit input level: 7 dBu- Max output level: 9.5 dBu11. Indicators- LEDs: Power indicator(green)，battery control indicator(red)- Voltage: Green LED lit：voltage>7.3V，Both green and red LED lit：voltage = 6.8-7.3V，Red - LED lit: Voltage<6.8V12. Battery: 9V block alkaline or 8.4V NIMH rechargeable battery13. Power adapter: Ext. input power DC 9V (pin = pos，ring = neg)14. Standby power consumption: 300 mW15. Max operation current: 90 mA16. Max output power into 20 ohm: 40 mW per channel17. Product net weight: 0.32kg18. Product size: length: 105mm x width: 103mm x height: 43mm

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Product Details 1. No-Hum AC hum eliminator 2. Easy to use, just plug it in! 3. Small and light, very portable, LED indicator 4. Suitable for use on 120V / 60Hz grounded USA-style power outlets 5. The No-Hum is specifically designed to eliminate ground-related Hum and Buzz issues, quickly and easily. 6. Simply plug it in, and it filters low voltage from the ground line that causes audio ground loop hum and buzz! Note that the Hum maintains a SAFE ground - NOT a ground lift! 7. The No-Hum does not manipulate voltage in any way, and will not affect sonic quality of audio gear. 8. The No-Hum is not designed to solve cable or pickup related noise. 9. Simply place the No-Hum on the power cord of offending equipment to get rid of hum and buzz. 10. A built-in LED indicator shows that the No-Hum is working. 11. The No-Hum is suitable for use on equipment up to but not exceeding 6 amps of current draw. Specification 1. Product net weight: 0.18 kg 2. Product size: length: 80mm x 44mm x 32mm

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B012 – Professional Stereo Signal Converted to Microphone Balanced Signal Output Product description:Professional 3.5mm interface stereo signal is converted to microphone balanced signal XLR interface, the product is equipped with an earthing switch to eliminate current humming noise. The product converts level signal from lines of audio equipment, such as laptop, MP3 player, CD players, mobile phones, and tablets, to a microphone balanced mixed signal output of left and right channels. The product has a regulatory function of volume control of level signal, 1/8” (3.5mm) TRS male input and 3-pin XLR male output.Product parameters: ◆Independent unit converts audio device level signal input to microphone balanced signal XLR output◆Output with independent level volume regulatory control switch◆3.5mm male input and XLR male output, line length: 150M◆The product adopts a high-performance transformer to eliminate voltage loop noise and reduce line noise◆Compact metal case, which is suitable for performing tour, bringing wonderful sound for your numerous performances◆Net weight: 0.23kg◆Gross weight with packaging: 0.33kg◆Product size: length 102mm X width 35mm X height 29mm◆Packaging size: length 185mm X width 135mm X height 65mmKit list:1 X Professional stereo signal converted to microphone balanced signal output

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B015 – Front Stereo Signal Amplifier Booster Headphones Speaker Amplifier Headset Dual-Audio SourceProduct description:You have a line level signal source (TV audio, MP3 player, Video game, mobile phone, tablet, computer, record player), but desire louder sound or bigger volume?A powerful signal amplifier receiver or volume control, you may need a long line connecting TV audio and the receiver on the other side of the room to provide high gain through any line level signal source, allowing longer cable operation or requiring “buffer” to amplify the lower volume. You may use it between the line level signal source and power amplifier as a signal amplifier, 3.5mm + RCA port matches almost all product interfaces.The product improves the sound amplification and reduces ground noise by controlling the signal, and it has large dynamic range without produce cracking. It controls output volume through a sensitive volume knob, the output of the headphone interface can drive 16Ω-600Ω headsets, and uses AC9V transformer for power supply to ensure full power.Product parameters:Input impedance: 100K OhmMaximum input level: +14 dBVOutput impedance: 47 Ohm of each output channelFrequency response: 20 Hz – 20K HzSignal to noise ratio: > 107dBTotal harmonic distortion: < 0.08%Intermodulation distortion: < 0.01%Input port: stereo 3.5mm socket and RCA portOutput port: stereo 3.5mm port and RCA portPower supply: AC9VNet weight: 0.51 kgGross weight with packaging: 0.61 kgProduct size: length 109 mm X width 79 mm X height 39 mmPackaging size: length 185mm X width 135mm X height 65mmKit list:1 X stereo signal preamplifier booster dual-audio source headphone amplifier1 X AC9V power adapter (AWG) line length 100cm

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B016 – 6 Input 1 Output Audio Signal Source Selection Switcher, Output Volume Adjustment Control RCA PortProduct description:6-channel stereo audio signal selection switcher with output volume adjustment function,The product adopts passive design, direct insertion, and has lossless switched transmission of input and output signals,The product is mainly used to select and switch among a variety of stereo signal input and output through a common set of equipment, that is, a variety of stereo signal sources of devices, such as TV audio, MP3 player, CD player, video game, mobile phone, tablet, computer, record player, need to be output on the amplifier or on active speakers,The 6-channel audio signal selection switcher solves complicated line plug in and plug out, which uniformly connects device input signal sources to the switcher for easily selection.The product uses standard RCA port design for input and output, and uses precise 6-level manual switch design for the switcher, with independent stereo volume adjustment control.Product parameters:Power supply: passive design, direct insertionMaterial: all-metal caseInput and output impedance: 10KΩ - 50KΩFrequency response: 20 – 20kHzDistortion: <0.002%Insertion loss: <0.01dBSignal gain: 0dBSignal to noise ratio S/N: >98dBInput port: standard RCA portOutput port: standard RCA portNumber of input channels: 6-channel stereo input signal sourcesNumber of output channels: 1-channel stereo outputControl switch: 6-level precise manual selection switchSwitching channel: 6 channelsNet weight: 0.25 kgGross weight with packaging: 0.35 kgProduct size: length 113 mm X width 50 mm X height 38mmPackaging size: length 185mm X width 135mm X height 65mmKit list:1 X 6 input 1 output stereo audio signal selection switcher, output volume adjustment RCA port

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B017 – 6 Input 1 Output Audio Signal Selection Switcher Output Volume Adjustment Control 3.5mm InterfaceProduct description:6-channel stereo audio signal selection switcher with output volume adjustment function,The product adopts passive design, direct insertion, and has lossless switched transmission of input and output signals,The product is mainly used to select and switch among a variety of stereo signal input and output through a common set of equipment, that is, a variety of stereo signal sources of devices, such as TV audio, MP3 player, CD player, video game, mobile phone, tablet, computer, record player, need to be output on the amplifier or on active speakers,The 6-channel audio signal selection switcher solves complicated line plug in and plug out, which uniformly connects device input signal sources to the switcher for easily selection.The product uses standard 3.5mm interface design for input and output, and uses precise 6-level manual switch design for the switcher, with independent stereo volume adjustment control.Product parameters:Power supply: passive design, direct insertionMaterial: all-metal caseInput and output impedance: 10KΩ - 50KΩFrequency response: 20 – 20kHzDistortion: <0.002%Insertion loss: <0.01dBSignal gain: 0dBSignal to noise ratio S/N: >98dBInput port: standard 3.5mm interfaceOutput port: standard 3.5mm interfaceNumber of input channels: 6-channel stereo input signal sourcesNumber of output channels: 1-channel stereo outputControl switch: 6-level precise manual selection switchSwitching channel: 6 channelsNet weight: 0.26 kgGross weight with packaging: 0.36 kgProduct size: length 109mm X width 54 mm X height 40 mmPackaging size: length 185mm X width 135mm X height 65mmKit list:1 X 6 input 1 output stereo audio signal selection switcher output volume adjustment 3.5mm interface

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B027 – 6 input 2 output or 2 input 6 output audio signal source selection switcher 3.5mm interfaceProduct description:6 input 2 output or 2 output 6 input stereo audio signal selection switcher, with RCA port designThe produce adopts passive design, with direct insertion, and has lossless switched transmission of input and output signals,The product is mainly used to select and switch among a variety of stereo signal input and output through a common set or multiple sets of equipment, that is, a variety of stereo signal sources of devices, such as TV audio, MP3 player, CD player, video game, mobile phone, tablet, computer, record player, need to be output on the amplifier or on active speakers,The 6-channel audio signal selection switcher solves complicated line plug in and plug out, which uniformly connects device input signal sources to the switcher for easily selection.The product uses standard 3.5mm interface design for input and output, and uses precise 6-level and 2-level manual switch design for the switcher, Product parameters:Power supply: passive design, direct insertionMaterial: all-metal caseInput and output impedance: 10KΩ - 50KΩFrequency response: 20 – 20 kHzDistortion: <0.002%Insertion loss: <0.01dBSignal gain: 0dBSignal to noise ratio S/N: >98dBInput port: standard 3.5mm interfaceOutput port: standard 3.5mm interfaceNumber of input channels: 6-channel stereo input (reverse 6-channel switched output)Number of output channels: 2-channel stereo output (reverse 2-channel switched input)Control switch: 6-level and 2-level precise manual selection switchInput switching channel: 6 channelsOutput switching channel: 2 channelsNet weight: 0.28 kgGross weight with packaging: 0.39 kgProduct size: length 122 mm X width 54 mm X height 39 mmPackaging size: length 185mm X width 135mm X height 65mmKit list: 1 X 6 input 2 output or 2 input 6 output stereo audio signal selection switcher 3.5mm interface

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1. Size: About 19x14x4.5 cm2. Weight: About 300 grams3. Power: 18+18W4. Voltage: DC12V5. Material: Aluminum alloy panel6. Function: Built-in bluetooth, can insert U disk, TF card, FM radio7. Features: Support MP3 format, use HIFIF audio amplifier chip, sound quality mellow and sweet, equipped with infrared remote control, high-DC dual-purpose power supply, wide applicability, simple operation, durable8. Note: The remote control contains a button battery

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1. Size: About 23x15x6 cm2. Weight: About 850 grams3. Power: 18+18W4. Voltage: DC12V/AC220V5. Material: Aluminum alloy panel6. Function: Built-in Bluetooth, can insert U disk, TF card, FM radio7. Features: Support MP3 format, use HIFIF audio amplifier chip, sound quality mellow and sweet, equipped with infrared remote control, high-DC dual-purpose power supply, wide applicability, simple operation, durable8. Note: The remote control contains a button battery

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1. Size: About 14x15x6.5 cm2. Weight: About 300 grams3. Power: 15+15W4. Voltage: DC12V/AC220V5. Material: Aluminum alloy panel6. Function: Built-in Bluetooth, can insert U disk, TF card, FM radio7. Features: Support MP3 format, use HIFIF audio amplifier chip, sound quality mellow and sweet, equipped with infrared remote control, high-DC dual-purpose power supply, wide applicability, simple operation, durable8. Note: The remote control contains a button battery

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Product description:1. Are you stuck with a set of power amplifier signals that need to be assigned to several speakers? Now this distribution panel can solve the problem of allocating one set of stereo inputs to four sets of speakers at the same time.2. Number of speakers: we recommend you to use no more than 4 sets of speakers3. Support power handling: rated power of each channel with amplifier up to 300W4. Speaker wires: 2 or 4 wires, 16 AWG to 14 AWG5. Easy to install: The input and output connectors can be wired, and the partition can be set. Compact design - Simple and compact designProduct parameters:1. Material: Metal2. Input: 1 set of input (banana plug)3. Output: 4 sets of output (banana plug)4. Power: Support 300W (The product requires no external power supply and is easy to install)5. Net weight: 0.51 kg6. Product weight after packaging: 0.56kg7. Product size: length 245mm x width 65mm x height 51mm8. Package size: length 250mm x width 73mm x height 60mm 9. Kit list: 1 in and 4 out Amplifier x 1

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Product description:1. Are you stuck with a set of power amplifier signals that need to be assigned to several speakers? Now this distribution panel can solve the problem of allocating one set of stereo inputs to 8 sets of speakers at the same time.2. Number of speakers: we recommend you to use no more than 8 sets of speakers3. Support power handling: rated power of each channel with amplifier up to 300W4. Speaker wires: 2 or 4 wires, 16 AWG to 14 AWG5. Easy to install: The input and output connectors can be wired, and the partition can be set. 5. Compact design - Simple and compact designProduct parameters:1. Material: Metal2. Input: 1 set of input (plug-type terminals)3. Output: 8 sets of simultaneous output (Pluggable terminal block)4. Power: Support 300W (The product requires no external power supply and is easy to install)5. Net weight: 0.32kg6. Product weight after packaging: 0.35kg7. Product size: length 175mm x width 72mm x height 28mm8. Package size: length 180mm x width 82mm x height 34mm9. Kit list: 1 in 8 out amplifier x 1

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Product presentation：Do you have 4 power amplifiers and 2 sets of speakers that need to be connected to each other?Do you need four amplifiers and two sets of speakers to get stuck?A powerful amplifier and audio switcher can solve these problems,1. 4 power amplifiers push-button select switch input,2 sets of stereo speakers push-button select switch output (2 sets of speakers can be opened or closed independently)2. sets of stereo speakers can sound at the same time, you can also turn off one group of speakers or more groups of speakers individually, manually select the pushbutton switch3. The power of each channel is 300W4. Signal input provides vacuum tube power amplifier signal no-load protection function5. manual selection of input and output switching, straight plug straight use, switching signal stability, between channels will not produce another dry close or noise6. Compact design of solid metal shell, easy installation, the product does not need external power7. simple installation: input and output plug and play easy installation, you can enjoy different audio experienceProduct Parameter：1. Compatible with all types of power amplifiers and speakers2. Input/output accepts heavy-duty speaker wire or speaker pin wire through the terminal port3. Connect the power amplifier to amplifier 1-2-3-44. Connect the loudspeaker to position A and B respectively5. Turn on your power amplifier stereo device and the product requires no external power supply6. Input: 4 sets of inputs (banana plug)7. Output: 2 sets of output (banana plug)8. Power: Up to 300W9. Metal material, fine steel housing, compact size suitable for any system10. Channel Power: Each channel supports up to 300W of power11. Frequency response: 10Hz-50KHz12. Net weight: 0.93 kg13. Packed weight: 1.09 kg14. Product size: Length 240mm x width 105mm x height 55mm15. Packing size: Length 260mm x width 185mm x height 65mm16. Kit list：4 input 2 output power amplifier and sound switcher loudspeaker switch distributor x 1

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Product Presentation：Do you have 4 power amplifiers and 2 sets of speakers that need to be connected to each other? Do you need four amplifiers and two sets of speakers to get stuck?A powerful amplifier and audio switcher can solve these problems,1. 4 power amplifiers push-button select switch input,2 sets of stereo speakers push-button select switch output (2 sets of speakers can be opened or closed independently)2. sets of stereo speakers can sound at the same time, you can also turn off one group of speakers or more groups of speakers individually, manually select the pushbutton switch3. The maximum power of each channel is 300W4. Signal input provides vacuum tube power amplifier signal no-load protection function5. manual selection of input and output switching, straight plug straight use, switching signal stability, between channels will not produce another dry close or noise6. Compact design of solid metal shell, easy installation, the product does not need external power7. Simple installation: Input and output plug and play easy installation, you can enjoy different audio experienceProduct Parameter：1. Compatible with all types of power amplifiers and speakers2. Input/output accepts heavy-duty speaker wire or speaker pin wire through the terminal port3. Connect the power amplifier to amplifier 1-2-3-44. Connect the loudspeaker to position A and B respectively5. Turn on your power amplifier stereo device and the product requires no external power supply6. Input:4 sets of inputs (banana plug)7. Output: 2 sets of output (banana plug)8. Power: Up to 300W9. Metal material, fine steel housing, compact size suitable for any system10. Channel Power: Each channel supports up to 300W of power11. Frequency response: 10Hz-50KHz12. Net weight: 0.93 kg13. Packed weight: 1.09 kg14. Product size: length 240mm x width 105mm x height 55mm15. Packing size: length260mm x width 185mm x height 65mm16. Kit list：4 input 2 output power amplifier and sound switcher loudspeaker switch distributor x 1

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Product presentation:1. Do you have a line level signal source (TV audio, MP3 player, video game, phone, tablet, computer, speaker, etc.) that is just not loud enough?2. Good performance audio source signal amplifier with volume control:Adopt new sound source signal amplifier circuit architecture, output level signal gain +20dB3. The new power boost protection module is convenient for outdoor use: USB 5V power supply, suitable for outdoor mobile power supply4. Wider range: 3.5mm + RCA interface for input and output, compatible with more devices5. Compact Desktop/Desktop Mini design6. Independent output volume adjustment7. Adopt compact and thin desktop mini - type design, compact size, compatible with any device8. Simple installation: plug and play input and output easy installation, you can enjoy a different audio experienceProduct Parameter1. Input impedance: 100K Ohm2. Output Gain: +20dB3. Frequency Response: 20 Hz - 20K Hz4. SNR (Signal to Noise Ratio): More than 107dB5. THD (total harmonic distortion): Less than 0.08%6. Intermodulation Distortion: Less than 0.01%7. Input port: Stereo 3.5mm jack and RCA interface8. Output port: Stereo 3.5mm interface and RCA interface9. Power supply: USB 5V10. Net Weight: 0.3 kg11. Packed weight: 0.45kg12. Product Size: Length 108 mm x width 75 mm x height 38 mm 13. Package Size: Length 185mm x width 135mm x height 65mmKit list:1. Headphone speaker amplifier prestage stereo signal amplifier x 12. USB power cord, length 120CM x 13. USB power adapter US standard x 1

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Product presentation:1. 4 microphone input interfaces (6.35mm), can be connected to 1-4 wired microphone2. 4 channels independent volume adjusting knob, can adjust the volume of 1-4 channels microphone flexibly3. Reverb adjustment function: Echo knob can adjust the reverberation effect size4. High and BASS adjustment function:BASS knob to adjust the BASS size of the microphone;The Treble knob adjusts the high pitch of the microphone5. 2 audio output interfaces: 6.5mm MIC mono output +RCA stereo audio output6. Standard USB 5V power supply mode, suitable for outdoor mobile power use, wider application range7. Using compact and thin desktop mini design, compact size, compatible with any device8. Simple installation: Input and output plug and play easy installation, you can enjoy different audio experienceProduct Parameter:1. Input interface: 6.35mm2. Output interface: 6.35mm+RCA3. SNR(Signal to Noise Ratio):120dB(A)4. Distortion: Less or equal to 0.025. Frequency response: 20Hz-20kHz6. Output noise: Less than 0.1mw7. Output impedance: 100kohm8. Net weight: 0.48 kg9. Packed weight: 0.63 kg10. Product Size: Length 165 mm x width 82 mm x height 38 mm 11. Packaging Size: Length 200mm x width 180mm x height 55mmKit list:1. 4-way microphone mixer supports stereo output x 12. USB power cord, length 120CM x 13. USB power adapter US standard x 1

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Product presentation:1. Sound adjustment: support high/medium/bass EQ adjustment, high/medium/bass can enhance +15dB and attenuation -15dB adjustment, support left and right channel balance adjustment, suitable for some need to adjust the tone of equipment, using compact and thin desktop mini design, compact size, compatible with any equipment2. Three sets of stereo mixed input: 3.5mm+6.5mm+RCA3. Provides three sets of stereo output simultaneously: RCA+RCA+3.5mm4. Independent Toner Audio Control: With independent audio source channel high/middle/bass control attenuations -15dB and +15dB gain, the sound adjustment design allows you to adjust the audio independently to listen to the experience and control the output volume independently5. Simple installation: input and output plug and play easy installation, you can enjoy different audio experience6. USB 5V power supply, suitable for different applicationsProduct Parameter:1. Input channel: 3-way stereo input 3.5mm+6.5mm+RCA interface2. Output channel: 3.5mm/RCA interface3. Input impedance: 100K Ohm4. Output gain: High, medium and low -15dB and +15dB5. Frequency response: 20Hz-20KHz6. Signal to noise ratio: More than 107dB7. Total Harmonic Distortion: Less than 0.08%8. Intermodulation distortion: Less than 0.01%9. Power supply: USB 5V10. Net weight: 0.38kg11. Gross weight after packing: 0.53kg12. Product size: Length 130 mm X width 77 mm X height 38 mm13. Packing size: Length 200mm X width 185mm X height 55mmKit list:1. Front Stereo Phoner High/Middle/Bass Adjuster x 12. USB power cord, length 120CM x 13. USB power adapter US standard x 1

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Product description:1. In this product, no power supply design, straight plug, no loss of input and output signal switching transmission, output level volume adjustment function is adopted.2. This product is mainly used to select and switch the input and common output of various fully balanced signal sources and a set of active speaker equipment.3. The input of two sets of full balanced stereo source selector switches solves the complicated line plugging operation. As long as the required input device signal source is uniformly connected to the switcher, it can be easily selected.4. The input and output of the product are designed with standard balanced XLR interface, and the diverter switch is designed with manual push-button switch with accurate 2 gears.5. Small size, great wisdom, this product is infinitely picky about sound quality, and infinitely tolerant to music. Passive front-end volume control switcher makes the desktop easier.Product parameters:1. Input and output impedance: 10Komhs - 50Komhs3. The use of a two-channel input switch balances the XRL input-output4. Input: Balanced XLR (toggle selection)5. Output: Balanced XLR 6. Net weight: 0.38kg7. Product weight after packaging: 0.5 kg8. Product size: length 160mm X width 62mm X height 39mm9. Package size: length 200mm X width 180mm X height 55mm10. Kit list: B028-- two-in-one-out XLR switcher x 1

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Product presentation:1. Do you have a line level signal source (TV audio, MP3 player, video game, phone, tablet, computer, speaker, etc.) that is just not loud enough/loud enough?2. Best performance audio source signal amplifier with volume control: new audio source signal amplifier circuit architecture, providing high and low pitch adjustment, output level signal gain +20dB3. The new power booster protection module is convenient for outdoor use:USB 5V power supply, suitable for outdoor mobile power supply4. Wider range: 3.5mm + RCA interface for input and output, compatible with more devices5. Compact Desktop/Desktop Mini design6. Independent output volume adjustment7. Using compact and thin desktop mini design, compact size, compatible with any device8. Simple installation: Input and output plug and play easy installation, you can enjoy different audio experienceProduct Parameter:1. Input impedance :100K Ohm2. Output gain: +20dB3. Frequency response: 20Hz - 20KHz4. Signal to noise ratio: more than 107dB5. Total Harmonic Distortion: Less than 0.08%6. Intermodulation distortion: Less than 0.01%7. Input port: Stereo 3.5mm jack and RCA interface8. Output port: Stereo 3.5mm interface and RCA interface9. Power supply: USB 5V10. Net weight: 0.31kg11. Gross weight after packaging: 0.46kg12. Product size: Length 108 mm x width 75 mm x height 38 mm13. Packing Size: Length 185mm x Width 135mm x Height 65mmKit list:1. Front-stereo signal amplifier headphone speaker amplifier x 12. USB power cord, length 120CM x 13. USB power adapter US standard x 1

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Product description:2 in 1 out or 1 in 2 out audio source signal selection, switcher, computer, speaker, audio source, switcher, RCA interface, lossless transmission1. No need for power supply design, direct plug and direct use, no loss of input and output signals, switching transmission,2. This product is mainly used to select a common output device for switching various stereo signal input. If there are two stereo signal sources (such as TV audio, MP3 player, CD player, video game, mobile phone, tablet, computer, record player), the device needs to output to the power amplifier or active speaker.3. Two sets of stereo source switchers solve the complex line plugging operation. As long as the required input device signal source is uniformly connected to the switcher, it can be easily selected.4. RCA interface design is used for product input and output standards, and the switch is designed with manual push-button switch of precise 2 positions.Product parameters:1. Power supply: no power supply, plug in and use directly2. Material: All metal case design3. Input and output impedance: 10 k ohms - 50 k ohms4. Frequency response: 20-20 kHz5. Distortion: Less than 0.002%6. Insertion loss: Less than 0.01dB7. Signal gain: 0dB8. SNR S/N: More than 98dB9. Input interface: Standard RCA interface10. Output interface: Standard RCA interface11. Number of input channels: 2 stereo input signal sources12. Number of output channels: 1 channel stereo output13. Control switch: Accurate selection of gear 2, manual switch14. Net weight: 0.14kg15. Gross weight after packaging: 0.16kg16. Product size: Length 69mm x width 43mm x height 39mm17. Package size: Length 83mm x width 73mm x height 51mm18. Kit list: 2 in 1 out signal selection switcher x 1

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Product presentation:1. Mini Active Stereo Mixer is a 5-way active stereo mixer for extended control of tuning, mixing instruments, CD players, tape players, computers, mobile phones, tablets, etc. It is compact and thin desktop mini design, compact in size, compatible with any device2. Power supply adopts USB 5V power supply suitable for outdoor mobile power supply3. Independent Audio Control: With independent audio source channel volume control knob design, you can adjust the volume of each input separately, to adjust the listening experience after mixing, and control the volume of each input independently4. Five-way stereo input mixed output level signal gain +20dB5. Simple installation: Input and output plug and play easy installation, you can enjoy different audio experience, output with earphone monitoring interfaceProduct Parameter:1. Input channel: 5-way stereo input RCA interface2. Output channel: 3.5mm/RCA interface3. Input impedance: 100K Ohm4. Output gain: +20dB5. Frequency response: 20Hz-20KHz6. Signal to noise ratio: More than 107dB7. Total Harmonic Distortion: Less than 0.08%8. Intermodulation distortion: Less than 0.01%9. Power supply: USB 5V10. Net weight: 0.38kg11. Gross weight after packing: 0.53kg12. Product size: Length 130mm x width 77mm x height 38mm13. Packing size: Length 200mm x width 185mm x height 55mmKit list:1. Mini Stereo Active 5-way Stereo Mixer x 12. USB power cord, length 120cm x 13. USB power adapter US standard x 1

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Product description:Do you have trouble connecting two power amplifiers to four sets of speakers? Do you need a power amplifier to make all four speakers sound at the same time?A powerful power amplifier with a sound switcher can solve the above problems.1. Touch-tone switching input for 2 power amplifiers, touch-tone selective switching output for 4 stereo speakers (4 sets of speakers can be turned on or off independently)2. Four sets of stereo speakers can sound at the same time, or one or more sets of speakers can be turned off separately, manually selecting a push-button switch3. Maximum support power per channel is 300W4. Signal input provides no-load protection function of vacuum tube power amplifier signal5. Provide output earphone monitoring function, 6.5mm interface, earphone output with volume adjustment function6. The input and output are manually selected for switching, and directly plugged in for direct use. The switching signal is stable, and there will be no additional dryness or noise between channels7. Compact design, strong metal case, easy installation, no external power supplyProduct parameters:1. Compatible with all types of power amplifiers and speakers.2. The input/output receives heavy speaker wire or speaker pin wire through the terminal port.3. Connect the power amplifier to the position of amplifier A or Amplifier B.4. Connect the loudspeakers to the 1-2-3-4 loudspeaker respectively.5. Turn on your power amplifier stereo, the product does not require external power.6. Earphone listening interface: 6.5mm7. Input: 2 sets of input (banana plug)8. Output: 4 sets of output (banana plug)9. Power: Support 300W10. Metallic material, stainless steel case, compact size suitable for any system.11. Channel power: Each channel supports up to 300W.12. Frequency response: 10Hz - 50KHz.13. Net weight: 0.86 kg14. Product weight after packaging: 0.98 kg15. Product size: Length 240mm x width 113mm x height 55mm16. Package size: Length 260mm x width 185mm x height 65mm high17. Kit list: 2 in 4 out power amplifier x 1

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About The ProductAre you still using common headset to chat and sing on computer? Are you still directly inserting the microphone to sing on computer? Are you still having a headache for a good sound card? Are you still bothered by having no good singing device, although you are born with a good voice? The product adopts the top reverb chip, perfectly supports double chorus, independent control and user-friendly feature, manually regulates the voice volume, designs the universal RCA jack without drive, the aluminum alloy CNC shell has better shielding performance. The product integrates 6 features, with the most professional Karaoke device system: 1. The first powerful function: Professional reverb: an ordinary sound card has no reverb effect, and it goes without saying that the song directly from a microphone without reverb is unpleasant to hear. 2. The second powerful function: Pure KTV effects: The product not only has the reverb effect, but also has the real damping tone, so that your singing tone at home is as perfect as that in KTV. 3. The third powerful function: Audio amplification function: With A937 product, you can passionately sing at conference, stage and home. 4. The fourth powerful function: Connect musical instrument: With musical accompaniment, you can record and sing while playing guitar, oh year! It is absolutely a pleasure! 5. The fifth powerful function: Shield current interference: When a common microphone or headset or other device is directly inserted to the computer, a big current sound can be heard, with the unique product design and unique power shielded line, this function can filter out very pure sound, and the sound effect is comparable to the real concert. 6. The sixth powerful function: Independent control function: You can independently control the accompaniment volume and let you sing with ease. A933 is a multi-functional analog sound console, more than merely a microphone effector, it is also a preamplifier system, Karaoke or reverberator, and the powerful hardware special reverb effect not only plays the music on computer or other audio player, but also allows you to hear the perfect combination of your voice and music like a professional singer. In addition, the product also enables mixing, reverb, delay, reverb volume regulation and other functions of professional sound console. In this way, you can easily become the DJ of yourself, make independent control, mellow bass, exercise your affection and understanding to music to the fullest, without delay, without noise, the sound will be clean and transparent, or mellow and charming! The unique middle and high-end microphone optimized design which is popular in the market will perfectly fulfill your degree of professionalism.Features1. Support reverb, mix, echo, delay and other Karaoke special effects. 2. Use external power supply, universal power supply DC12V. 3. Support pure recording or mixing, alternatively used for independent PC or family recording connection device. 4. Support a variety of sound cards (PC integrated sound card, external independent USB sound card). 5. Support two sets of microphone input (6.3mm TRS), enable the simultaneous double singing function. 6. Support a set of output (headphone or speaker). 7. Support high-quality microphone amplifier, support multimedia microphone, dynamic microphone, self-powered capacitor microphone. 8. Support TS or TRS input. 9. Two sets of control knobs, one for microphone volume, and the other for reverb volume. 10. A set of Music in RAC stereo jacks, a set of Music out RCA stereo jacks, a set of video I/O RCA jacks. 11. Audio I/O: RCA stereo jack. 12. Power supply: Universal power supply DC 12V.Package List1 x A933 Mini Karaoke sound console. 1 x 3.5mm plug to 3.5mm plug (length: 150cm). 2 x 3.5mm bus to RCA (length: 50cm). 1 x 100-240V power adapter (DC 12V), American Standard, power cord length: 100cm.

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About The Product1. Prefer sound quality, seek reproduction, multi-operational serial thrust, A935 selects two operational amplifier sets (OPA2604AP+OPA2107) featuring good sound quality and large thrust provided by American famous BB, with superb effect, the small-sized distinct dual-power boosted circuit carefully researched by engineer upgrades the transparency of OPA2604 to the highest grade of amplification effect. Power is the key to producing good sound from the portable headphone amplifier, and A933 power supply adopts the complex and costly dual-power design. Among so many single-power headphone amplifiers available in the market, A933 high-quality high-current positive-negative power supply is absolutely considered as the "master grade". Through partitioning, headphone amplification is kept far away from the power supply to solve the possible electromagnetic interference caused by power boost. Ultra-small-sized audio filter capacitor array + LC type filter circuit reduce the system ripple to the minimum, providing clean and high transient power to the headphone amplification circuit. As a headphone amplifier with the strongest sound quality, A935 is featured by high SNR, delicate and transparent sound quality and large thrust. Headphone fans are often experienced that, although headphone is the nearest acoustic device to human ears, even the distance from common in-ear buds to the eardrum is only 1-2 cm, in most cases, the sound is heard to be obscure, as if the glass cannot be properly cleaned, it sounds a bit unclear, A933 will free you from this concern. 2. This product uses quadruplex potentiometer to regulate the volume, the power switch is provided by Japan ALPS, the power relay is provided by Japan NEC to offer dual protection on the output circuit, prevent impact sound and protect the headphone. Its power supply is added with the unique charging feature, which can charge other intelligent devices and output 1A current. 3. About burn-in: Our intended design effect is only achieved after burning-in the product for some time. For headphone and speaker: need to burn-in for 96 hours; for amplifier and other devices: need to burn-in for 24 hours, burn-in mode: select the continuous burn-in or the cumulative regular use.Advantages1. Upgraded sound quality: top sound quality, let time prove everything, make sound transparent, awaken music inspiration, the new design concept, more than imagination, three-partition isolation circuit, master power, two operational amplifier sets (OPA2604AP+OPA2107AP) provided by US Famous BB, treble/bass is felt to significantly upgrade one level after multi-operational serially connecting to the product, which is benefited from the internal +/-7.5V high voltage for greatly enhancing the thrust. 2. Details reproduction: The product can capture more details which are not the extra addition to product but the existing ones, because non-professional headphone amplifier often disposes such details. 3. Increased sound field: Anyone who doesn't use a good headphone amplifier may never better understand "sound field", it is a sense of presence, the sense of scene heard from a transductive headphone is different from that added to the product, it is worth noting that a good headphone amplifier deserves a good headset. 4. Backup cellphone power: The unique product design (cellphone charging) can be used as the backup power.

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About The Product1. LINEPAUDIO A962 fancier-level HiFi Vacuum Tube Power Headphone Amplifier PreAmp, made of Beijing classic quality 6J9-J vacuum tube, USB-PC supported ASIO sound effect software will give out more professional, full, open-stage, soft and smooth sound, especially applicable to voice, string music, light music, and classical music, the performance of different frequency points is so perfect! Fine at high frequency, strong at low frequency! Easily drive 16??-600 ?? headphone of any class, quiet background without any current background noise! Two sets of audio signal inputs, one is USB signal input (USB-PC), USB cable is connected to PC, plug and play without a drive, directly used as an upscale USB external sound card. The USB port can be also connected to any model of Android mobile phones with OTG function. The other is 3.5mm interface audio signal input and you can connect it to mobile phone, CD, lossless music player or other audio source devices. In case of simultaneous inputs of USB signal and 3.5mm interface signal, 3.5mm interface signal input is preferred. 2. LINEPAUDIO A962 has three sets of audio signals, simultaneously output to meet the interface of different devices (RCA/3.5mm/6.35mm), the output end will deliver to you a real HiFi experience, whether connected to your upscale headphone or speaker, or used as a timbre adjustable PreAmp to connect your digital power amplifier, multimedia speaker or various stereo devices, what a real PreAmp. Of course, if you want to try the timbre style of different tube amplifiers, this product can fully meet your requirement, compatible with E180F, 6688 and other tube models, you may exchange at will. 3. Many music fanciers are concerned about the background noise of vacuum tube headphone amplifier, but this product frees you from this concern, its performance in controlling background noise is extraordinary, the background is quiet after several tests and optimizations of the circuit design, without any current background noise, you will hear the purest, most natural, and most nostalgic sound. As to the testing of the current background noise: as it is known to all, the current background noise comes from two sources, one is the vacuum tube headphone amplifier, the other is the audio source or the audio cable (the audio cable makes it more likely to generate background noise), the correct procedure of testing the headphone amplifier is to disconnect the audio input cable, with power on, if the background of the headphone amplifier is quiet, it indicates that the headphone amplifier has a very high SNR. If unquiet, or this seriously affects you from listening music, it indicates that the headphone amplifier has a very low SNR. 4. Notes: An electronic interference device near the desktop may also affect the SNR. For example, if the vacuum tube power amplifier is placed near a wireless router or device, it may be interfered to some extent. Enclosed by an aluminum shell, miniaturized but exquisite, the front, rear panel is precisely processed by CNC machining center, you will get a terrific handle, the ultra-small volume will not occupy your desktop space too much. More than a multi-functional upscale high-fidelity USB sound card vacuum tube headphone amplifier, it is also a beautiful desktop ornament. All letters on the machine panels are printed using expensive laser carving and will never fade off.Features1. 2 sets of signal inputs (USB-PC and 3.5mm input), 3.5mm input is preferred. 2. 3 sets of stereo signal outputs: 3.5mm / 6.35mm / RCA simultaneous signal outputs, allowing you to connect different device interfaces. 3. USB: PC Supported ASIO sound effect software (ASIO drive to be installed) 4. Input power: >=1100mW (32ohms). 5. Matched headphone impedance: 16ohms-600ohms. 6. Frequency response: 20 kHz - 30kHz. 7. Support sampling rate: 16Bit - 32k Bit, 44.1kHz, 48kHz.

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About The Product1. The condenser microphone is the preferred option for sound engineers. LINEPAUDIO A963 Microphone provides professional and stable 48V power supply, compact and made of metals, equipped with XLR balanced I/O making it easier to connect the microphone with other devices. 2. The professional condenser microphone phantom power supply has some prominent advantages: a broad range of frequency band, straight response curve, high output, smaller non-linear distortion, and good transient response.Features1. Applicable to all condenser microphones, provide stable 48V power supply. 2. Provide 1x Balanced XLR condenser microphone input port. 3. Provide 1x Balanced XLR condenser microphone output port.

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About The Product1. LINEPAUDIO A966 is a high-quality eight-channel high-power headphone amplifier which perfectly drives various high-impedance pro monitor headphones, provides the performer with quality monitor sound quality, and enables the performer to get immersed in the show and fully present his own musical work. This product not only provides the function of headphone amplifier, in order to be more user-friendly, it has a built-in intercom function at the studio-level. When the sound engineer wants to communicate with the performer in a different room, just insert the microphone (intercom microphone) to easily issue to the performer various working instructions, what the engineer jus said will be transmitted to eight headphones. 2. It provides eight sets of stereo channel outputs to improve the sound quality control and amplification and the background noise is small, with a wide dynamic range without sonic boom, the output sound volume of each channel is controlled by sensitivity adjustment knob, each channel can drive 16ohms-600ohms headphone, lossless in the quality without distortion. The product also provides an independent 6.5mm stereo associated input port, which can be easily connected to other devices in the studio; furthermore, it provides one-channel microphone intercom function input function, allowing for an easy intercom in the internal channel. 3. The circuit has OP + BUG architecture and uses AC12V transformer power supply to ensure a strong drive. 4. The 16ohms-600ohms high-impedance headphone can be driven through the volume regulation knob, with full sound, calm bass, clear high frequency, without any signal sonic boom. It is a headphone distributer as well as a headphone amplifier, which can easily drive the 16ohms-600ohms headphone. It has extensive applications, including band rehearsal /studio recording/ home entertainment/music enjoyment/comparison of business headphone distribution.Features1. 4x 6.35mm Stereo headphone output port (optionally connected to the headphone of any impedance). 2. 4x 3.5mm Stereo headphone output port (optionally connected to the headphone of any impedance). 3. TS 6.35mm L and R input port (optionally connected to the signal sound sources such as computer sound card or mixing console). 4. TRS 6.35mm Stereo input port (optionally connected to the intercom such as microphone). 5. 4 Independent channels stereo volume output control knob. 6. Input impedance: 100KOhm. 7. Max. input level: +14dBV. 8. Output impedance: 47 Ohm at each output channel . 9. Power source: AC12V. 10. Frequency response: 20Hz - 20KHz. 11. SNR: > 107dB. 12. THD: < 0.08%. 13. IMD: < 0.01%. 14. Input port: Stereo 1/4 TRS plug, L and R channel, 1/4 TS plug. 15. Output port: 4x 6.35mm Stereo 1/4 headphone jack + 4x 3.5mm Stereo 1/8 headphone jack.

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About The Product1. LINEPAUDIO A967 Passive PreAmp Active Speak Volume Two-Channel Controller is small and compact, applicable to use with active speaker or PostAmp, supports full-balanced or single-ended signal I/O, equipped with a switch for easily switching I/O signal. 2. Infinitely picky about the sound quality, infinitely tolerant on music. Passive PreAmp Volume Controller makes the desktop simple. 3. Small size but great wisdom, LINEPAUDIO A967 is tiny but with a complete set of common interfaces, supports full-balanced audio signal regulation and single-ended audio signal regulation, and switches I/O signal. 4. Suitable for the decoder and speaker without volume regulation, with the balanced I/O, RCA I/O architecture and switch function enabled. Its PreAmp will not cause a loss of signal source. In general, the audio source signals out of the decoder reproduces the original signals. The large dynamic range will not cause a quality loss, but keep the original signal source intact. 5. The preferred choice of active speaker, more and more music fans are not satisfied with the sound quality performance of common multimedia speakers, but rather select professional active monitor speakers. But such speakers generally don't have a volume regulation knob, but have to use with PreAmp. Most active monitor headphones are used for the desktop near-field listening, but a common HiFi PreAmp is large and occupies a large area. Moreover, most are concerned about whether the timbre of PreAmp matches the speaker or not, whether the sound effect is ideal or not. 6. But from now on, LINEPAUDIO A967 Two-Channel Volume Controller perfectly addresses the above two concerns, LINEPAUDIO A967 is small and compact, the internal circuit architecture design will not cause a loss of sound quality, the internal power amplifier of active speaker is enough to drive the speaker, so that you can hear the most genuine timbre and quality of the speaker, free from the need of choosing a suitable PreAmp.Features1. Input/Output impedance: 10Kohms - 50Kohms. 2. Two-channel I/O switch, RCA and Balanced XRL I/O. 3. Input: RCA / Balanced XLR (switch). 4. Output: RCA / Balanced XLR (switch).

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1. Rated voltage: 12-18V 2. Rated power: 40W 3. Resolution: 47K 4. Distortion: 0.4% 5. Size: 15.30 x 10.00 x 3.50 cm; material: metal. 6. SNR: >=80dB 7. Amplifier type: HIFI amplifier

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1. Rated voltage: 12-18V 2. Rated power: 40W 3. Resolution: 47K 4. Distortion: 0.01% 5. Size: 14.00 x 11.50 x 4.00 cm; material: metal. 6. SNR: >=80dB 7. Amplifier type: AV amplifier 8. Rated response: 20Hz-20KHz

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1. Durable and reliable. 2. Plug and play. 3. Connect method: With 4 mm banana plug connection; also direct crimping; 3mm binding post crimping hole; Diameter fo 2 panel holes: 12mm; 19mm hole space; 42mm long, 5mm screw shaft diameter, 19mm pitch; 4. Can be installed on panel within 5mm. 5. Material: alloy + ABS

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1. Bit depth: 16bit / 24bit 2. Signal to noise ratio: 105dbB 3. Dynamic range: 110dB 4. Input audio: PC-USB / Coaxial / Toslink digital audio 5. Output audio: left / right audio and 6.35mm headphones 6. Input audio connector: PC-USB, Toslink, 1XRCA (coaxial) 7. Output audio interface: 6.35mm headphones, 2XRCA (R / L) 8. Size: 165x97x33mm 9. Weight: 296 grams 10. Working temperature: 0 degree to + 70 degree 11. Power adapter: DC 12V 1A 12. Accessories: host, power supply 12V 1A, fiber optic cable, printing cable, 6.35 to 3.5 headphone cable, instruction manual

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