Introduction
This manual provides detailed instructions for the safe and efficient operation of your Pyle PMXU43BT 4-Channel Professional Audio Mixer. Please read this manual thoroughly before using the device to ensure proper setup and functionality. Keep this manual for future reference.
Safety Information
- Ensure the power adapter cable is securely connected and matches the specified voltage.
- Do not expose the unit to rain or moisture to prevent electric shock or fire.
- Avoid placing the unit near heat sources or in direct sunlight.
- Do not open the casing; refer all servicing to qualified personnel.
- Disconnect the power supply during lightning storms or when unused for long periods.
Package Contents
- Pyle PMXU43BT Studio Mixer Unit
- Power Adapter Cable (4-Pin)
- USB Cable

Image: The Pyle PMXU43BT mixer, along with its power adapter and USB cable, as included in the package.
Product Overview and Controls
The Pyle PMXU43BT is a versatile 4-channel audio mixer designed for professional studio applications and on-stage performances. Below is a diagram highlighting its key components and controls.

Image: A detailed view of the mixer's top panel with labels for each control and input/output port.
Input Channels (1-4)
- MIC/LINE Inputs (Channels 1-2): (2) XLR/1/4'' Combo Audio Inputs for microphones or line-level instruments.
- PAD Button: Attenuates input signal by 26dB for high-level sources.
- +48V Phantom Power Button: Activates phantom power for condenser microphones on Channels 1-2.
- GAIN Control: Adjusts the input sensitivity for each channel.
- HIGH/MID/LOW EQ: 3-band equalizer for tone adjustment (-15/+15dB).
- FX/SEND Control: Adjusts the amount of signal sent to the internal effects processor.
- LEVEL Control: Adjusts the output level of each channel to the main mix.
USB/MP3 Player Section
- USB Port: For connecting USB flash drives for MP3 playback or connecting to a computer.
- LCD Digital Display: Shows track information, effect programs, and mode.
- Control Buttons: Play/Pause, Skip Tracks, Mode selection (Bluetooth, USB, PC).
Effects Section
- 16 DSP Program Selector: Rotary knob to select from 16 digital multi-effects.
- REPEAT Control: Adjusts the repetition rate of the selected effect.
- RETURN Control: Adjusts the overall level of the effects returned to the main mix.
Output Section
- MAIN OUT (L/R): (2) 1/4'' (L/R) outputs for connecting to main speakers or amplifiers.
- CTRL OUT: (2) 1/4'' outputs for control room monitors.
- SEND + RETURN: (2) 1/4'' inputs for external effects processing.
- PHONES Jack: 1/4'' stereo headphone output.
- STEREO Level Fader: Controls the overall output level of the main stereo mix.
- Output Signal Level Indication: LED meters to monitor output levels.
Setup
1. Power Connection
- Connect the 4-pin power adapter cable to the DC IN port on the rear of the mixer.
- Plug the power adapter into a suitable electrical outlet (100-240V).
- Turn on the mixer using the Power ON/OFF switch located on the rear panel.
2. Input Connections
- Microphones: Connect XLR or 1/4'' microphone cables to the MIC/LINE inputs on Channels 1-2. If using condenser microphones, activate +48V Phantom Power.
- Line-Level Instruments: Connect instruments (e.g., keyboards, guitars with preamps) to the MIC/LINE inputs (Channels 1-2) or 1/4'' Mono + Stereo Inputs (Channels 3-4). Use the PAD button for high-output sources if needed.
- USB/MP3 Devices: Insert a USB flash drive into the USB port for MP3 playback.
3. Output Connections
- Main Speakers: Connect your main speakers or amplifier to the MAIN OUT (L/R) 1/4'' jacks.
- Headphones: Plug your headphones into the PHONES 1/4'' jack for monitoring.

Image: The Pyle PMXU43BT mixer, ready for connection and operation.
Operating Instructions
1. Basic Mixing & EQ
- Adjust the GAIN control for each input channel to achieve an optimal signal level without clipping (indicated by the PEAK LED).
- Use the HIGH, MID, and LOW controls to shape the tone of each channel.
- Adjust the LEVEL control for each channel to balance its volume within the overall mix.
- Use the STEREO Level Fader to control the master output volume. Monitor the Output Signal Level Indication LEDs to prevent clipping.
2. Bluetooth Wireless Streaming
- Press the MODE button in the USB Player section until 'BT' appears on the LCD display.
- On your external device (smartphone, tablet, laptop), search for Bluetooth networks and select 'KT-08UP'.
- Once connected, you can stream audio wirelessly to the mixer. Use the USB Player controls for playback.

Image: Demonstrates connecting a smartphone to the mixer via Bluetooth for wireless audio streaming.
3. USB/MP3 Playback
- Insert a USB flash drive containing MP3 or WAV audio files into the USB port.
- The mixer will automatically switch to USB mode or you can select it using the MODE button.
- Use the playback controls (Play/Pause, Skip Tracks) on the USB Player section to manage your audio.

Image: Illustrates the process of connecting a USB flash drive to the mixer for MP3 playback.
4. Direct-to-Computer Connection & Recording
- Connect the mixer to your computer using the provided USB cable.
- Select 'PC' mode on the mixer using the MODE button.
- Your computer should recognize the mixer as an audio input/output device. You can then use recording software (e.g., Audacity) to record the stereo output of the mixer.

Image: The mixer connected to a laptop, demonstrating its direct-to-computer recording capability.
5. FX (Digital Effects) Processor
- Turn the 16 DSP Program Selector knob to choose from the 16 available effects. The selected program number will appear on the LCD display.
- Adjust the FX/SEND control on individual channels to send the desired amount of signal to the effects processor.
- Use the REPEAT control to adjust the effect's repetition rate.
- Adjust the RETURN control to blend the processed effect signal back into the main mix.
6. Phantom Power
- For condenser microphones, press the +48V Phantom Power button on Channels 1-2. An LED indicator will illuminate.
- Ensure dynamic microphones are not connected when phantom power is active, as this may cause damage.
7. Headphone Monitoring
- Plug your headphones into the PHONES 1/4'' jack.
- Adjust the PHONES level control to set your desired monitoring volume.
Video: An overview of the Pyle Professional Audio Mixer Sound Board Console System - PMXU43BT, demonstrating its features and functionality.
Maintenance
- Clean the unit with a soft, dry cloth. Do not use liquid cleaners or aerosols.
- Keep the unit free from dust and debris.
- Avoid exposing the unit to extreme temperatures or humidity.
- Regularly check all cable connections for wear and tear.
Troubleshooting
- No Power: Ensure the power adapter is correctly connected and the power switch is ON. Check the power outlet.
- No Sound Output: Verify all input and output cables are securely connected. Check channel LEVEL controls and the STEREO Level Fader. Ensure connected speakers/amplifiers are powered on and functioning.
- Distorted Sound: Reduce the GAIN control for the input channel(s) and the STEREO Level Fader to prevent clipping (PEAK LEDs should not be constantly lit). Check cable integrity.
- Bluetooth Connection Issues: Ensure the mixer is in 'BT' mode. Check that 'KT-08UP' is selected on your device and within range (15'+ ft.).
- USB Playback Failure: Ensure the USB drive contains compatible audio files (MP3, WAV). Try a different USB drive.
Specifications
| Feature | Specification |
|---|---|
| Input Mixer Channels | 4-Ch. (+ FX/Headphones) |
| Mic Input Sensitivity/Impedance | 1.5mV/750 Ohm |
| HIGH/MID/LOW Adjustment | -15/+15dB |
| Stereo Output Level Meter | 5-Segment (+6, +3, 0, -3, -10dB) |
| PAD Input Channel Adjustment | 26dB |
| Peak CLIP Level | <3dB |
| Phantom Power Voltage | +48V |
| Power Supply | 100-240V (+/-15V DC Power Adapter) |
| Digital Audio File Compatibility | MP3, WAV |
| Dimensions (L x W x H) | 9.3'' x 7.5'' x 2.6'' |
| Weight | 3.95 lbs |
| Bluetooth Version | 4.0 |
| Wireless Range | 15'+ ft. |
Warranty
This product comes with a standard manufacturer's warranty. Please refer to the warranty card included in your package or visit the official Pyle website for detailed warranty terms and conditions.
Support
For technical support, troubleshooting assistance, or any questions regarding your Pyle PMXU43BT mixer, please contact Pyle customer service. Contact information can be found on the official Pyle website or in your product documentation.





