1. Introduction
Thank you for purchasing the Moukey MAMX3 Ultra-Low Noise 8-Channel Line Stereo Audio Mixer. This manual provides detailed instructions for the proper setup, operation, and maintenance of your device. Please read this manual thoroughly before use to ensure optimal performance and to prevent damage.

Figure 1: Moukey MAMX3 8-Channel Line Stereo Audio Mixer
2. Safety Instructions
- Do not expose this device to rain or moisture to avoid fire or electric shock.
- Do not open the casing. There are no user-serviceable parts inside. Refer all servicing to qualified personnel.
- Ensure the power supply voltage matches the requirements specified on the unit.
- Avoid placing the unit near heat sources or in direct sunlight.
- Clean only with a dry cloth. Do not use liquid cleaners.
- Keep out of reach of children.
3. Product Features
- 8-Channel Input: Mix up to eight independent audio signals.
- Stereo/Mono Switching: Flexible input/output configuration for both stereo and mono signals. For stereo, use 1/4-inch (6.35mm) TRS stereo audio male-to-male cables. For mono, eight mono signal inputs are mixed into one mono signal output.
- Independent Volume Control: Each input channel features a dedicated volume knob for precise level adjustment.
- Ultra-Low Noise Operation: Designed for minimal distortion and excellent audio performance.
- Compact and Portable: Space-saving design for easy transport and setup.
- DC 5V Power Supply: Powered via DC 5V, offering versatile power options (e.g., USB port, power bank, 5V phone plug).
- Durable Construction: Robust metal casing ensures longevity.
4. Product Overview
The Moukey MAMX3 mixer features a straightforward layout for easy operation. Below are diagrams illustrating the controls and input/output ports.

Figure 2: Top Panel Controls
- Input 1-8 Level Knobs: Adjust the volume for each individual input channel.
- Mono/Stereo Switches: Select between mono or stereo operation for input channels.
- Channel Output Mix L-R Switch: Combines channels 1-4 and 5-8 into a single stereo output.
- Output A/B Level Knobs: Adjust the overall output volume for Output A and Output B.

Figure 3: Rear Panel Input/Output Ports
- INPUT 1-8 (1/4" TRS/TS): Connect your audio sources here.
- OUTPUT A (1/4" TRS): Main audio output.
- OUTPUT B A/B L-R (1/4" TRS): Secondary audio output, can be configured for A/B or Left/Right stereo.
- DC 5V (USB-C): Power input port.
- Pow Indicator: Illuminates when the unit is powered on.

Figure 4: Product Dimensions
5. Setup
5.1 Power Connection
- Locate the DC 5V USB-C port on the rear panel of the mixer.
- Connect the provided USB cable to the mixer and to a compatible 5V power source (e.g., computer USB port, power bank, or 5V phone charger).
- The 'Pow' indicator light will illuminate, indicating the mixer is receiving power.

Figure 5: Power Supply Options
5.2 Audio Input Connections
- Connect your audio sources (e.g., microphones, guitars, bass, keyboards, media players) to the INPUT 1-8 jacks using 1/4-inch TRS or TS cables.
- For stereo input, use 1/4-inch (6.35mm) TRS stereo audio male-to-male cables and ensure the corresponding Mono/Stereo switch is set to 'Stereo'.
- For mono input, use 1/4-inch TS cables and ensure the corresponding Mono/Stereo switch is set to 'Mono'.
5.3 Audio Output Connections
- Connect the OUTPUT A and/or OUTPUT B jacks to your amplifier, powered speakers, or recording device using 1/4-inch TRS cables.
- Ensure all connections are secure before proceeding to operation.
6. Operating Instructions
6.1 Powering On/Off
The mixer powers on automatically when connected to a 5V power source. Disconnect the power cable to turn off the unit.
6.2 Adjusting Channel Levels
- Turn all LEVEL knobs (1-8) and OUTPUT A/B knobs to their minimum position before playing any audio.
- Start playing audio from your connected source.
- Slowly increase the LEVEL knob for the corresponding input channel until the desired volume is achieved.
- Adjust the OUTPUT A/B knobs to control the overall master volume.
6.3 Stereo/Mono Mode Selection
Use the Mono/Stereo switches above each channel to select the desired mode. For stereo operation, ensure you are using TRS cables for both input and output and the switch is set to 'Stereo'. For mono operation, set the switch to 'Mono'.
6.4 Mixing Multiple Sources
The MAMX3 allows you to mix up to eight line-level signals. Adjust each channel's LEVEL knob independently to create your desired mix. The Channel Output Mix L-R switch can combine channels 1-4 and 5-8 into a single stereo output for simplified routing.

Figure 6: Mixer in a typical setup
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the mixer. Do not use abrasive cleaners, solvents, or waxes.
- Storage: When not in use for extended periods, store the mixer in a cool, dry place away from direct sunlight and extreme temperatures.
- Cable Care: Always handle cables by the connector, not the wire. Avoid bending or crimping cables excessively.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output |
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| Distorted sound |
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| Humming or buzzing noise |
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| Stereo channels not working correctly |
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9. Specifications
| Feature | Specification |
|---|---|
| Brand | Moukey |
| Model | MAMX3 |
| Number of Channels | 8 |
| Product Dimensions (D x W x H) | 12 cm x 11.4 cm x 5 cm (approx. 4.7 x 4.5 x 2 inches) |
| Connectivity Technology | USB |
| Power Source | Corded Electric (DC 5V) |
| Output Connector Type | 1/4" TRS (Balanced) |
| Audio Input | 1/4 inch (6.35mm) TRS stereo audio cable, TRS / TS cable |
| Voltage | 5 Volts |
| Country of Origin | China |
10. Warranty and Support
This Moukey MAMX3 mixer comes with a 12-month warranty from the date of purchase. This warranty covers manufacturing defects and workmanship under normal use.
The warranty does not cover damage caused by:
- Improper installation or operation.
- Unauthorized modifications or repairs.
- Accidents, misuse, or neglect.
- Natural disasters or power surges.
For technical support, warranty claims, or any questions regarding your Moukey MAMX3 mixer, please contact our customer service team through the retailer where you purchased the product or visit the official Moukey website for contact information.
Note: No official product video URL (m3u8 format) was provided in the product data. Therefore, no video is embedded in this manual.





