1. 3.5mm 2-in-1-out Audio Switcher with independent volume control for each input; any input can be set as background audio.
2. Dual-knob design for separate volume adjustment of each channel.
3. Plug-and-play with included cables; independently powered for stable transmission.
4. Aluminum alloy housing for durability and heat dissipation.
5. Compatible Devices: Devices with standard 3.5mm or RCA jacks (e.g., computer, TV, MP3 player, phone, monitor, projector, recorder, amplifier, network media player, gaming console, etc.).
6. Dimensions: 65 x 53 x 25mm.
7. Product Function: 2-channel audio input, 1-channel output.
8. Product Interface: 3.5mm jacks x 3.

Package Contents: Main Unit, Audio Cable, Power Cable.

Product Features:
Do you have 6 sets of stereo signal sources and 2 sets of output devices that need to be connected and get stuck?
A powerful stereo switcher can solve the multi-device plugging and unplugging problem.
1. The 6-channel input adopts high-contact reliability self-locking key switches for switching. When one key is pressed, the other switch will automatically pop up to disconnect the circuit.
2. The 2-channel output XLR/RCA interface is a synchronous output, which is convenient for connecting power amplifiers and active speakers to produce sound simultaneously.
3. The RCA switching adopts the L/R simultaneous switching mode. ※ All inputs and outputs of GND are universal.
4. XLR switching adopts the simultaneous switching mode of HOT and COLD. (All inputs and outputs of GND are universal.)
5. The output is equipped with a one-button mute switch and adds a set of 6.35 headphone monitoring output function.
6. Simple installation: The input and output are plug-and-play for easy installation. The signal source can be switched without loss, allowing you to enjoy a different listening experience
7. Mainly used for selecting and switching various stereo signal inputs to share the output of one or more sets of devices, such as multiple stereo signal sources (TV audio, MP3 players, etc.) devices such as CD players, video games, mobile phones, tablets, computers, and record players need to output to power amplifiers or active speakers.
8. The 6-group audio signal selection switcher solves the complex multi-device line plugging and unplugging operation. Just connect the signal sources of the devices that need to be input to the switcher uniformly, and you can easily and conveniently select them.

Product Parameters:
1. Material: Metal iron casing
2. Colour: Black
3. The line selector uses high-quality components to accurately convey the original sound
4. Power supply: No external power supply required, plug and play
5. Input/Output interfaces: XLR and RCA interfaces
6. One-click mute switch, simple and convenient to operate
7. Input channel number: 6 channels (XLR/1, RCA/5)
8. Output channel number: 3 channels of XLR/RCA/6.35mm, with 3 groups being synchronous outputs
9. Control switch: 6 channels are switched by high-contact reliability self-locking push-button switches.
10. When one of the keys is pressed, the other switch will automatically pop up to disconnect the circuit
11. Net weight of the single item: 570 grams /1.26 pounds
12. Product dimensions: 197mm in length x 84mm in width 37mm in height

Shipping list:
1 X B081--6 input 3 output audio signal selector switcher

Product Features:
Do you have 3 sets of balanced signal sources and 2 sets of output devices that need to be connected and get stuck?
A powerful stereo switcher can solve the multi-device plugging and unplugging problem.

1. The 3-channel input adopts high-contact reliability self-locking key switches for switching. When one of the keys is pressed, the other switch will automatically pop up to disconnect the circuit.
2. The 2-channel output XLR/RCA interface is a synchronous output, which is convenient for connecting power amplifiers and active speakers to produce sound simultaneously.
3. The RCA switching adopts the L/R simultaneous switching mode. (All inputs and outputs of GND are universal.)
4. XLR switching adopts the simultaneous switching mode of HOT and COLD. (All inputs and outputs of GND are universal.)
5. The output is equipped with a one-button mute switch and adds a set of 6.35 headphone monitoring output function.
6. Simple installation: The input and output are plug-and-play for easy installation. The signal source can be switched without loss, allowing you to enjoy a different listening experience
7. Mainly used for selecting and switching various stereo signal inputs to share the output of one or more sets of devices, such as multiple stereo signal sources (TV audio, MP3 players, etc.) devices such as CD players, video games, mobile phones, tablets, computers, and record players need to output to power amplifiers or active speakers.
8. The 6-group audio signal selection switcher solves the complex multi-device line plugging and unplugging operation. Just connect the signal sources of the devices that need to be input to the switcher uniformly, and you can easily and conveniently select them.

Product Parameters:
1. Material: Metal iron casing
2. Colour: Black
3. The line selector uses high-quality components to accurately convey the original sound
4. Power supply: No external power supply required, plug and play
5. One-click mute switch, simple and convenient to operate.
6. Input/Output interfaces: XLR and RCA interfaces
7. Input channel number: 3 channels (XLR/2, RCA/1)
8. Output channel number: 3 channels of XLR/RCA/6.35mm, with 3 groups being synchronous outputs
9. Control switch: The 3-channel switch adopts a high-contact reliability self-locking push-button switch for switching.
10. When one of the keys is pressed, the other switch will automatically pop up to disconnect the circuit
11. Net weight of the single item: 550 grams /1.21 pounds
12. Product dimensions: 197mm in length x 84mm in width x 37mm in height

Shipping list:
1 x B082 3-in-3-out audio signal selector switcher

Product features:
Do you have 6 sets of stereo signal sources and 2 sets of output devices that need to be connected and get stuck?
A powerful stereo switcher can solve the problem of multi-device plugging and unplugging, and is simple and convenient to operate.

1. The 6-channel input adopts high-contact reliability self-locking key switches for switching. When one key is pressed, the other switch will automatically pop up to disconnect the circuit.
2. Two groups of outputs can be output simultaneously and can be connected to power amplifiers or active speakers to produce sound at the same time. Adopt the L/R simultaneous switching mode. (All inputs and outputs of GND are universal.)
3. Simple installation: The input and output are plug-and-play, making installation convenient. The signal source can be switched without loss, allowing you to enjoy a different listening experience
4. It is mainly used to select and switch various stereo signal inputs and share the output of one or more sets of devices, such as multiple stereo signal sources (TV audio, MP3) devices such as players, CD players, video games, mobile phones, tablets, computers, and record players need to output to power amplifiers or active speakers.
5. 6 groups of audio signal selection switchers solve the complex line plugging and unplugging operations. Just connect the signal sources of the devices that need to be input to the switcher uniformly easy and convenient to choose.

Product Parameters:
1. Material: Metal iron casing
2. Colour: Black
3. Interface: RCA interface
4. Power supply: No external power supply required, plug and play
5. Adopt the L/R simultaneous switching mode. (All inputs and outputs of GND are universal.)
6. Input/Output interface: Standard RCA interface
7. Number of input channels: 6 stereo selectable switching inputs
8. Output channel number: 2 stereo synchronous output channels
9. Control switch: 6-position high-precision mechanical self-locking switch. When one of the keys is pressed, the other switch will automatically pop up to disconnect the circuit
10. Net weight of the single item: 330 grams /0.728 pounds
11. Product dimensions: 137mm in length x 60mm in width x 41mm in height

Shipping list:
1 x B080 6 input 2 output audio signal selector switcher

Product Features:
Do you have 4 power amplifiers and 4 sets of speakers that need to be connected together?
A powerful amplifier and speaker selection switcher can solve the above problems.
1. Four power amplifiers use push-button self-locking switches to select and switch inputs, and four groups of stereo speakers use push-button self-locking switches to select and switch outputs
2. It can use a banana head interface or accept up to 12 AWG speaker cables. Fully compatible with all types of amplifiers and speakers.
3. The 6.35mm headphone jack provides stereo headphone output for personal listening signal monitoring, and the headphone output has independent volume adjustment.
4. Stereo speakers supporting impedance from 4 to 16 ohms, with each channel supporting a maximum power of up to 300W
5. Input and output can be manually selected and switched, with plug-and-play functionality. The switching signal is stable, and there will be no interference or noise between channels
6. Compact design, sturdy metal casing, easy installation, and no external power supply required for the product
7. Simple installation: The input and output are plug-and-play, making installation convenient and allowing you to enjoy a unique audio experience

Product Parameters:
1. Material: Metal iron casing
2. Colour: Black
3. Compatible with all types of power amplifiers and speakers.
4. The input/output accepts heavy-duty speaker wires or speaker pin wires through the terminal port.
5. Connect the power amplifier to the A-B-C-D positions of the amplifier.
6. Connect the speakers to positions 1, 2, 3 and 4 of the speakers respectively.
7. Turn on your power amplifier stereo device. The product does not require an external power supply.
8. Input/Output: 4 groups of input /4 groups of output (4mm banana plug)
9. Metal material, stainless steel casing, compact size suitable for any system.
10. Channel power: Each channel supports a maximum power of up to 300W.
11. Net weight of the single item: 1270 grams /2.8 pounds
12. Product dimensions: 320mm length x 105mm width x 60mm height

Shipping list:
1 x 4 in 4 out power amplifier

Product Features:
Do you have one set of playback devices and three sets of balanced signal devices that need to be connected and confused?
A powerful balanced signal stereo selection switcher can solve the problem of multi-device connection plugging and unplugging, without the need for an external power supply and with lossless switching

1. One set of balanced signal input, three sets of balanced signal output
2. The switching switch adopts a three-position rotary high-contact, high-precision and reliable knob switch, ensuring lossless switching.
3. A non-short switching mode is adopted. It adopts the simultaneous switching mode of HOT and COLD. Note: All inputs and outputs of GND are universal.
4. The LR of the input and output terminals is symmetrically configured on the left and right, and the LR of the internal wiring is separated on the left and right, with a L/R separation structure. Reduced mutual interference among LRS.
5. When switching the operation and rotating the gear switch, there will be no popping sound, which does not affect the sound quality and ensures lossless transmission
6. When used as a signal source device for playback and a selector for amplifiers (preamplifiers)
(1) Connect the signal source device to the input COM.
(2) Output terminals 1-2-3 can be connected to a maximum of 3 preamplifiers or preamplifier main amplifiers. (Please do not mistake the L/R connection.)
7. When used as a preamplifier, power amplifier or power speaker selector
(1) Connect the preamplifier to the input terminal COM.
(2) Output terminals 1-2-3 can be connected to a maximum of 3 power amplifiers, power speakers or active monitor speakers.(Please do not mistake the L/R connection.)
8. Connection Example 1: Input 1 playback signal source device and output 3 amplifiers
9. Connection Example 2: Input 1 preamplifier (Output three power amplifiers or power speakers or active monitor speakers)

Product Parameters:
1. Material: Metal iron casing
2. Colour: Black
3. Interface: XLR interface
4. Power supply: No external power supply required, plug and play
5. Input 1 system/Output 3 system
6. The input and output terminals adopt gold-plated XLR terminals, achieving highly reliable contact.
7. Non-short switching
8. Switch between HOT and COLD simultaneously
9. All inputs and outputs of GND are universal
10. Net weight of the single item: 820 grams /1.81 pounds
11. Product dimensions: 232mm in length x 112mm in width x 55mm in height

Shipping list:
1 x B073 1 input 3 output Fully balanced Audio Signal selector switcher

Product Features:
Do you have 3 sets of balanced XLR signal devices and 1 set of balanced XLR signal output that need to be connected and get stuck?
A powerful balanced signal stereo selection switcher can solve the problem of multi-device connection plugging and unplugging, without the need for an external power supply and with lossless switching
1. 3 sets of balanced signal input, 1 set of balanced signal output
2. The switching switch adopts a three-position rotary high-contact, high-precision and reliable knob switch, ensuring lossless switching.
3. A non-short switching mode is adopted. It adopts the simultaneous switching mode of HOT and COLD. Note: All inputs and outputs of GND are universal.
4. The LR of the input and output terminals is symmetrically configured on the left and right, and the LR of the internal wiring is separated on the left and right, with a L/R separation structure.
Reduced mutual interference among LRS.
5. When switching the operation and rotating the gear switch, there will be no popping sound, which does not affect the sound quality and ensures lossless transmission
6. When used as a signal source device and a selector for amplifiers (preamplifiers)
(1) Input terminals 1-2-3 can be connected to a maximum of 3 playback signal source devices.
(2) The amplifier (preamplifier or preamplifier master) is connected to the output terminal COM. (Note: Please do not mistake the L/R connection.)
7. When used as a preamplifier, power amplifier or power speaker selector
(1) Input terminals 1-2-3 can be connected to a maximum of 3 preamplifiers.
(2) Connect the power amplifier or power speaker or active monitor speaker to the output terminal COM.(Note: Please do not mistake the L/R connection.)
8. Connection Example 1: Input 3 playback signal source devices and output 1 amplifier
9. Connection Example 2: Input 3 preamplifiers (Output one power amplifier or power speaker or active monitor speaker)

Product Parameters:
1. Material: Metal iron casing
2. Colour: Black
3. Interface: XLR interface
4. Power supply: No external power supply required, plug and play
5. Input system 3 / Output System 1
6. The input and output terminals adopt gold-plated XLR terminals, achieving highly reliable contact.
7. Non-short switching
8. Switch between HOT and COLD simultaneously
9. All inputs and outputs of GND are universal
10. Net weight of the single item: 830 grams /1.83 pounds
11. Product dimensions: 232mm in length X 112mm in width X 55mm in height

Shipping list:
B072-3-in-1-out fully balanced audio signal selector switcher

1. Material: metal
2. Connector: RCA connector 1/4"TRS
3. Power supply: DC 12V
4. Power adapter: EU plug, input 110-240v 50/60Hz, output 12v 500mA
5. Ultra-compact preamplifier with metal casing, lightweight and durable
6. 2 x RCA (L & R) inputs 2 x RCA (L & R) outputs 1x1/4" TRS output, multiple connection options
7. With level and volume control knobs
8. Convert telephone signals to line level signals
9. Ultra-low audio performance, providing excellent sound quality
10. Size: 10.3x5.7x3cm
11. Weight: 177 grams

Do you have 4 power amplifiers and 2 sets of speakers that need to be connected to get stuck?
Do you need 2 amplifiers and 4 groups of speakers to choose from?
A Powerful power Amplifier Selector Switcher Can Solve the above Problems,
1. 4 power amplifier gear switch rotary selection switching input,
2. Groups of stereo speaker gear switch rotary selection switching output, the device supports two modes of use,forward access 4 power amplifiers and 2 groups of speakers, reverse access 2 power amplifiers and 4 groups of speakers.
3. Can use banana head interface or can accept up to 12 AWG speaker cable. Fully compatible with all types of amplifiers and speakers.
4. Headset 6.35mm interface provides stereo headset output, for personal listening signal monitoring, headset output independent volume adjustment.
5. Support 4 to 16 ohms impedance stereo speakers, each channel support power up to 300W
6. Input and output manual selection switch, direct insertion and direct use, switching signal is stable, there is no other interference or noise between channels
7. Compact design solid metal shell, easy installation, the product does not need external power supply
8. Simple installation: input and output plug and play easy installation, you can enjoy a different audio experience

Product parameters:
1. Material: Metal iron shell
2. Compatible with all types of power amplifiers and speakers.
3. Input/output accepts heavy speaker wire or speaker pin wire through the terminal port.
4. Connect the power amplifier to amplifier 1-2-3-4.
5. Connect speakers to speakers A and B respectively.
6. Turn on your power amplifier stereo device and the product requires no external power supply.
7. Input/output: 4 sets of input /2 sets of output (banana plug)
8. Metal material, steel casing, compact size to fit any system.
9. Channel power: Each channel supports power up to 300W.
10. Net weight: 0.85kg
11. Weight including packaging: 1.02kg
12. Product size: Length 240mm X width 90mm X height 55mm
13. Package size: Length 260mm X width 185mm X height 65mm

Packing list:
1 X 4 In 2 Out or 2 In 4 out Power Amplifier Speaker Select Switcher

1. Material: metal
2. Input type: LINE IN (O IN)
3. Output type: LINE OUT (O OUT)
4. Built-in battery: None
5. Recommended headphone impedance: 65-80 ohms (MAX)
6. Type: mini amplifier
7. Power adapter: US standard
8. Ultra-compact stereo headphone amplifier for studio and stage applications.
9. 8 headphone output channels and 1 input channel
10. The volume of each output channel can be controlled independently
11. Ultra-low noise 4580 operational amplifier with excellent performance
12. Comes with DC 12V power adapter
13. Product size: approximately 19.6x5.7x3.1cm
14. Product weight: 350g

Packing list:
Amplifier x 1
Power adapter x 1
English manual x 1
Only the above package contents, other products are not included
Note: different lighting and monitors may cause the color of the item in the picture to be slightly different from the actual item, measurement tolerance is +/- 1- 3cm

1. The power amplifier board is designed with the official standard circuit, and the chip selection uses the original Class D power amplifier chip.
2. The power amplifier has super power, and can output 10W+10W power under the condition of 12V power supply. The chip does not need a heat sink, and it also has overheating, overcurrent and other protection functions
3. This board has a switch function, short the SW to turn off the power amplifier.
4. Specification model: XH-M181
5. Chip model: PAM8610
6. Working mode: Class D (PWM modulation type)
7. Power supply range: DC 6V~15V (self-protection)
8. Recommended voltage: DC 12V2A
9. Frequency response: 20HZ-15KHZ
10. Channel type: dual channel
11. Static current: 20mA (DC 12V)
12. Signal-to-noise ratio: 90%
13. Recommended speaker: 10~100W
14. Input impedance: 15K
15. Output impedance: 4~8Ω
16. Output power: 10W x 2 (8Ω) 15W x 2 (4Ω)
17. Harmonic distortion: less than 0.1%

1. Bluetooth version: 5.0
2. Support call (long press the pause button to answer the call when there is an incoming call)
3. Support 3.5MM head microphone function
4. Support recording, recording supports operation in TF/USB mode (long press the remote control MODE button to start recording, long press the remote control PLAY button to switch between recording and music playback. when recording, you need to connect a storage device, U disk or TF card)
5. Support power off memory
6. Power supply voltage: support DC 6-18V, current 1-3A
7. Can be directly connected to speakers, with power amplifier and decoding functions
8. Support song format: MP3 /WMA / WAV / APE / FLAC
9. Main function: MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control (you need to bring your own CR2402 button battery)
10. Power: 40W
11. Supports folder selection and playback: When USB or TF is playing, there is a folder in the device and there are songs in the folder. Press the previous button or the next button twice to select the folder to play the song, and the screen will display accordingly
12. Size: about 9.3x2.5cm
13. Weight: about 38g

• Input Type:USB,COAXIAL,OPTICAL
• Model Number:DAC-X6
• Signal To Noise Ratio:105
• Applicable voltage:100V-240V

Product presentation:
Do you have 3 power amplifiers and 3 sets of speakers that need to be connected to each other?
Do you need 3 amplifiers and 3 sets of speakers to get stuck?
A powerful amplifier and audio switcher can solve these problems,

1. 3 power amplifiers push-button select switch input,3 sets of stereo speakers push-button select switch output (3 sets of speakers can be opened or closed independently)
2. 3 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 switch
3. The maximum power of each channel is 300W
4. Signal input provides vacuum tube power amplifier signal no-load protection function
5. manual selection of input and output switching, straight plug straight use, switching signal stability, between channels will not produce another dry close or noise
6. Compact design of solid metal shell, easy installation, the product does not need external power
7. Simple installation: input and output plug and play easy installation, you can enjoy different audio experience

Product Parameter:
1. Compatible with all types of power amplifiers and speakers
2. Input/output accepts heavy-duty speaker wire or speaker pin wire through the terminal port
3. Connect the power amplifier to amplifier 01-02-03
4. Connect the loudspeaker to position A-B-C respectively
5. Turn on your power amplifier stereo device and the product requires no external power supply
6. Input:3 sets of inputs (banana plug)
7. Output:3 sets of output (banana plug)
8. Power: up to 300W
9. Metal material, fine steel housing, compact size suitable for any system
10. Channel Power: Each channel supports up to 300W of power
11. Frequency response: 10Hz-50KHz
12. Net weight :0.96 kg
13. Packed weight :1.13 kg
14. Product size: length 240mm X width 105mm X height 55mm
15. Packing size: length260mm X width 185mm X height 65mm
16. Kit list: 3 input 3 output power amplifier and sound switcher loudspeaker switch distributor x 1

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

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.

Specification
1. Input: 2 x XLR connector,balanced
2. Output: 6.35mm and 3.5mm TRS connector
3. Input impedance: 20K ohm
4. Output impedance: 10K ohm per channel
5. 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 dB
9. Crosstalk: >40dB
10. System Data
- Normal input level: 2 dBu
- Max input level: 6 dBu
- Limit input level: 7 dBu
- Max output level: 9.5 dBu
11. 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<6.8V
12. Battery: 9V block alkaline or 8.4V NIMH rechargeable battery
13. Power adapter: Ext. input power DC 9V (pin = pos，ring = neg)
14. Standby power consumption: 300 mW
15. Max operation current: 90 mA
16. Max output power into 20 ohm: 40 mW per channel
17. Product net weight: 0.32kg
18. Product size: length: 105mm x width: 103mm x height: 43mm

Product Functions
1. A977 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.
2. 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.

Specification
1. Input/output impedance: 10KΩ - 50KΩ
2. 2 in 2 out switchover, unbalanced RCA connector and balanced XRL connector for input/output
3. Input: unbalanced RCA connector / balanced XLR connector (convert selection)
4. Output: unbalanced RCA connector / balanced XLR connector (convert selection)
5. Product net weight: 320g
6. Product dimensions: length 145mm x width 65mm x height 43mm

• Channels:2 (2.0)
• Type:Home Amplifier

1. Audio channel: 2.1 channel
2. Bluetooth version: 5.0
3. Audio input: Bluetooth+AUX+U disk+USB sound card
4. Audio output: Passive speaker + 3.5mm interface stereo output
5. Volume adjustment: Encoder knob adjustment, smooth feel
6. Frequency range: 20Hz-30KHz
7. Signal to noise ratio: 92dB
8. Output power: 50W x 2
9. Adapted speaker: 10-200W /4/8 ohm
10. Output filter: LC filter
11. Protection mechanism: Static electricity, overvoltage, undervoltage, overheating, DC detection and short circuit protection
12. Adapter power supply: DC 5-26V/5A above
13. Function: Support Sinilink APP control
14. Size: about 9.5 x 7 x 2.5cm
15. Weight: about 130g

Packing list:
1. Upper cover
2. Bare board
3. Lower cover
4. Knob cap x4
5. M2x4+3 copper pillar x 4
6. M2x3 screw x 8
7. M2x18 copper pillar x 4
8. DC adapter x 1
9. Heat sink x 1
10. Thermally conductive silicone paste x 1

• Brand Name:LEORY
• Model Number:Karaoke sound mixer

1. Size: About 14x15x6.5 cm
2. Weight: About 300 grams
3. Power: 15+15W
4. Voltage: DC12V/AC220V
5. Material: Aluminum alloy panel
6. Function: Built-in Bluetooth, can insert U disk, TF card, FM radio
7. 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, durable
8. Note: The remote control contains a button battery

1. Size: About 23x15x6 cm
2. Weight: About 850 grams
3. Power: 18+18W
4. Voltage: DC12V/AC220V
5. Material: Aluminum alloy panel
6. Function: Built-in Bluetooth, can insert U disk, TF card, FM radio
7. 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, durable
8. Note: The remote control contains a button battery

1. Size: About 19x14x4.5 cm
2. Weight: About 300 grams
3. Power: 18+18W
4. Voltage: DC12V
5. Material: Aluminum alloy panel
6. Function: Built-in bluetooth, can insert U disk, TF card, FM radio
7. 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, durable
8. Note: The remote control contains a button battery

Package:Yes
PCM:No
Built-in Battery:No
Channels:2 (2.0)
Output Power: 1W
Recommended Headphone Impedance: 501-600 Ohm
Input Type: LINE IN (AUDIO IN)
Output Type: LINE OUT (AUDIO OUT)
DSD (Direct Stream Digital):No
Bluetooth:No
Brand Name:IWISTAO
Dimensions (WxHxD):320 mm* 180 mm * 160 mm
WIFI: No
Type: Professional Amplifier
Earphone amplifier output: 1W
Output impedance of Earphone amplifier:32 ~ 600 ohm
Output power of tube amp:2 x 8W (4 ohm)
Frequency response: 26-38 KHz +/- 2dB
Total harmonic distortion: Less than 0.008% (10Hz to 20 kHz)
Signal to Noise Ratio: Greater than 118dB (A weight)
Net weight (W*D*H):6.2kg
Operating voltage:110 ~ 240V / 50 ~ 60 Hz
Output Type:RCA

【Product Details】

"No-Hum AC Hum Eliminator
Easy to Use, just Plug it In!
Small and Light, Very Portable
LED Indicator
Suitable for use on 120V 60Hz grounded USA-style power outlets
The No-Hum is specifically designed to eliminate ground-related Hum
and 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 rid
of 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 Eliminator
Easy to Use, just Plug it In!
Small and Light, Very Portable
LED Indicator
Suitable for use on 120V 60Hz grounded USA-style power outlets
Product net weight: 0.18 kg
Product weight after packing: 0.23kg
Product size: length:80mm X width:44mm X height:32mm
Packing size: length:90mm X width:82mm X Height:57mm



【Packing list】

1 X B983—AC ground circuit buzz eliminator

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

Product function introduction

A977 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 parameters

Input/output impedance: 10KΩ - 50KΩ
2 in 2 out switchover, unbalanced RCA connector and balanced XRL connector for input/output
Input: unbalanced RCA connector / balanced XLR connector (convert selection)
Output: unbalanced RCA connector / balanced XLR connector (convert selection)
Product net weight: 0.32 kg
Product package weight: 0.42 kg
Product dimensions: length 145mm X width 65mm X height 43mm
Packaging dimensions: length 200mm X width 180mm X height 55mm


Kit list

1 X A977 2 In and 3 Out Switcher Full-balance Passive Preamp Active Speaker Double Sound Source Volume Controller

1. 5 sets stereophonic select input (each one set input with independent switch, able to start at the same time and mix together to input, also able to close one set independently)
2. 5 sets stereophonic output at the same time (each one set output with independent volume switch adjustment)
3. Solve the problem that multiply equipment input and multiply equipment output at the same time.
4. 5 sets output sound at the same time and amplify gain +15dB
5. Simple installation: Input and output, able to be used once inserted, convenient to install, input and output signal no consumption, then can enjoy different hearing experience

Product Parameter
1. Material: Metal
2. Interface: RCA interface
3. Power supply: USB 5V supply power
4. Input and output impedance: 10KΩ - 50KΩ
5. Frequency responding: 20 - 20kHz.
6. Distortion: Less than 0.002%
7. Output consumption: Less than 0.01dB
8. Signal gain: +15dB
9. Signal-noise ratio S/N: Greater than 98dB
10. Input and output interface: Standard RCA interface
11. Input passageway quantity: 5 sets stereophonic select input (5 sets input able to start at the same time and mix together to input, also able to close one set independently)
12. Output passageway: 5 sets stereophonic output (each one set output with independent volume adjustment)
13. Control switch: Input and output adopt self lock switch, accurately select manually shift
14. Output select shift passageway: 5 passageways
15. Single product net weight: 0.53kg
16. Product size: Length 168mm x width 97mm x height 38mm

Kit list
1. B065 5 in 5 out audio frequency signal select sound mixing distribute device x 1
2. USB power supply wire (wire length 100cm) x 1

1. You have one stereophonic signal source (TV audio frequency, player, video game, mobile phone, PAD, computer, gramophone) want to output to other equipment at the same time (example the power amplifier, loudspeaker box or prepose amplifier)
2. This type product able to solve that 1 set stereophonic input able to distribute output 4 sets stereophonic,
3. Output has volume adjustment function, output without sound amplify function, the output keep the original tone quality and volume same with the input.
4. Input and output adopt 3.5mm earphone interface
5. Simple installation: input and output, able to be used once inserted, convenient to install, input and output signal no consumption, then can enjoy different hearing experience

Product Parameter
1. Material: metal
2. Interface: 3.5mm interface
3. Power supply: USB 5V supply power
4. Input and output impedance: 10KΩ - 50KΩ
5. Frequency responding: 20 - 20kHz.
6. Distortion: Less than 0.002%
7. Output consumption: Less than 0.01dB
8. Signal gain: 0dB
9. Signal-noise ratio S/N: Greater than 98dB
10. Input and output interface: Standard 3.5mm interface
11. Input passageway: 1 set stereophonic input
12. Output passageway: 4 sets stereophonic output at the same time (4 sets output unified volume adjustment)
13. Single product net weight: 0.15 kg
14. Product size: 87mm x 52mm x 22mm

Kit list
1. B064 1 in 4 out audio frequency signal distribute device 3.5mm interface x 1
2. USB power supply wire (wire length 100cm) x 1
3. 3.5 public to public wire (wire length 100cm) x 1

1. You have one stereophonic signal source (TV audio frequency, player, video game, mobile phone, PAD, computer, gramophone) want to output to other equipment at the same time (example the power amplifier, loudspeaker box or prepose amplifier)
2. This type product able to solve that 1 set stereophonic input able to distribute output 4 sets stereophonic,
3. Output has volume adjustment function, output without sound amplify function, the output keep the original tone quality and volume same with the input.
4. Input and output adopt standard RCA interface
5. Simple installation: input and output, able to be used once inserted, convenient to install, input and output signal no consumption, then can enjoy different hearing experience

Product Parameter
1. Material: Metal
2. Interface: RCA interface
3. Power supply: USB 5V supply power
4. Input and output impedance: 10K ohms - 50K ohms
5. Frequency responding: 20 - 20kHz.
6. Distortion: Less than 0.002%
7. Output consumption: Less than 0.01dB
8. Signal gain: 0dB
9. Signal-noise ratio S/N: Greater than 98dB
10. Input and output interface: Standard RCA interface
11. Input passageway: 1 set stereophonic input
12. Output passageway: 4 sets stereophonic output at the same time (4 sets output unified volume adjustment)
13. Single product net weight: 0.21kg
14. Product size: 95mm x 53mm x 38mm

Kit list
1. B063 1 in 4 out audio frequency signal distribute device RCA interface x 1
2. USB power supply wire (wire length 100cm) x 1

Do you have trouble at that how to connect 2 sets stereophonic signal source and 8 sets output equipment?
Do you have trouble at that how to make 8 sets equipment output send sound at the same time after 2 sets equipment select shift output?
One strong stereophonic shift distribute device able to solve the problems that multiply equipment plug in and out,
1. 8 sets stereophonic output has independent switch, able to start at the same time, also able to be closed independently, start at the same time no consumption at the signal source tone quality and volume.
2. 2 sets input able to start at the same time and mix together to input, also able to close one set independently,
3. Able to solve the problem that able to distribute output 8 sets stereophonic after 1 set or 2 sets stereophonic mix input, output independent switch control,
4. Simple installation: input and output, able to be used once inserted, convenient to install, input and output signal no consumption, then can enjoy different hearing experience

Product Parameter
1. Material: Metal
2. Interface: RCA interface
3. Power supply: USB 5V supply power
4. Input and output impedance: 10K ohms - 50K ohms
5. Frequency responding: 20 - 20kHz.
6. Distortion: Less than 0.002%
7. Output consumption: Less than 0.01dB
8. Signal gain: 15dB
9. Signal-noise ratio S/N: Greater than 98dB
10. Input and output interface: Standard RCA interface
11. Input passageway quantity: 2 sets stereophonic shift input (2 sets input able to start at the same time and mix together to input, also able to close one set independently)
12. Output passageway quantity: 8 sets stereophonic shift input (able to start at the same time and close independently)
13. Control switch: Input and output adopt self lock switch, accurately select manually shift
14. Input shift passageway: 2 passageways
15. Output shift passageway: 8 passageways
16. Single product net weight: 0.45 kg
17. Product size: 167mm x 81mm x 38mm

Kit list
1. B062 2 in 8 out audio frequency signal select shift device x 1
2. USB power supply wire (wire length 100cm) x 1

1. Non source prime stage stereophonic volume adjustment controller,
2. Suitable to too big volume gain equipment (example computer sound card, DAC decoder, CD machine, digit player, source loudspeaker box, late stage power amplifier and other equipment),
3. Volume adjustment adopt professional 129mm clipper volume switch, smaller clipper switch precision error, more better left and right track synchronization, sound details no consumption.
4. Make table type volume adjustment more convenient, volume size adjustment more visual and exquisite size.
5. Simple installation: input and output, able to be used once inserted, convenient to install, signal source non consumption adjustment, then can enjoy different hearing experience

Product Parameter
1. Material: Metal
2. Interface: Gold plating RCA interface
3. Power supply: No need additionally connect power supply, able to be used once inserted
4. Input and output impedance: 10Kohm - 50Kohm
5. Frequency responding: 20 - 20kHz.
6. Distortion: Less than 0.002%
7. Output consumption: Less than 0.01dB
8. Signal gain: 0dB
9. Signal-noise ratio S/N: Greater than 98dB
10. Input and output interface: Standard RCA interface
11. Volume control switch: Adopt professional 128mm clipper volume switch
12. Single product net weight: 0.54 kg
13. Product size: 170mm x 69mm x 50mm

Do you have trouble at that how to connect 4 sets stereophonic signal source and 2 sets output equipment?
Do you have trouble at that how to connect 2 sets signal source equipment and 4 sets output equipment?
One strong stereophonic shift distribute device able to solve the problems that multiply equipment plug in and out, double way use. With remote control shift function.
1. 4 sets stereophonic input, 2 sets stereophonic output adopt digit switch shift and remote control shift, will not generate burst sound when shifting
2. Input and output able to be used once inserted, non consumption shift at input and output signal.
3. Mainly used to select and shift various stereophonic signal input mutually use to output one set or multiply sets equipment, example there has multiply stereophonic signal source (TV audio frequency, MP3 player, CD player, video game, mobile phone, PAD, computer, gramophone) and other equipment need output to power amplifier or source loudspeaker box.
4. 4 sets signal audio source select shift device solve the complex circuit plug in and out operation, unify connect the equipment signal source which need input to the shift device then easily convenient to select.
5. This product able to realize two operating methods, 4 input 2 output, reversely wiring realize 2 input 4 output, double ways use.
1. Simple installation: input and output, able to be used once inserted, convenient to install, signal source non consumption shift, then can enjoy different hearing experience

Product Parameter
1. Material: Metal
2. Interface: RCA interface
3. Power supply: USB 5V supply power, able to be used once inserted
4. Input and output impedance: 10Kohms - 50Kohms
5. Frequency responding: 20 - 20kHz.
6. Distortion: Less than 0.002%
7. Output consumption: Less than 0.01dB
8. Signal gain: 0dB
9. Signal-noise ratio S/N: Greater than 98dB
10. Input and output interface: standard RCA gold plating interface
11. Input passageway: 4 ways stereophonic shift input (can not mix input at the same time, select 1 in 4 to output)
12. Output passageway: 2 ways stereophonic select and shift output (cannot output at the same time, select 1 in 2 to output)
13. Control switch method: manually shift, or remote control shift
14. Input shift passageway: 4 passageways
15. Output shift passageway: 2 passageways
16. Single product net weight: 0.35kg
17. Product size: length 123mm x width 75mm x height 38mm

Kit list
1. B060--4 in 2 out audio frequency signal select and shift device x 1
2. USB power supply wire (wire length 100cm) x 1
3. Remote controller x 1