Audio Choice — Qm4 Manual __top__

Audio Choice QM4 Manual: Comprehensive Guide to the 4-Channel Powered PA System

: If you have a cable plugged into the EFX Loop or Line Out, it may be breaking the internal signal flow circuit. Disconnect all patch cables to test for standalone functionality.

: Houses the overall master volume, a Master Graphic Equalizer , and an LED level meter to track the 100W built-in amplifier's headroom. Setup Guide & Rear Panel Connections audio choice qm4 manual

Determines how much of that specific channel’s signal is fed into the internal analog spring reverb tank. Keep this off (fully counter-clockwise) for speaking seminars, but dial it up to add warmth for vocalists and acoustic musicians. 🎚️ Master Section & Routing Features

Allows sending the mix to a recording device or an additional powered speaker. EFX Loop: Allows external effects processors to be added. Audio Choice QM4 Manual: Comprehensive Guide to the

: Use the per-channel Tone knobs to remove "mud" (turn left) or add "crispness" (turn right). Use the Master 3-Band EQ to compensate for the room's acoustics.

This feature is very useful for adding external effects processors to your overall mix. For example, you can connect a digital reverb pedal between the Send and Return jacks to add hall, plate, or room reverb effects to your master output. Setup Guide & Rear Panel Connections Determines how

Unlike modern all-digital mixers, the QM4 offers a simple, tactile interface with dedicated knobs for every function—a design that many users find practical and immediate for live sound situations.

: Boosts treble response for vocal crispness and speech intelligibility. 4. Reverb Send Control

Slowly increase the knob on specific channels to add depth to vocals or acoustic instruments. 4. Troubleshooting and Tips No Sound: Verify the power indicator is lit. Check all cable connections (input and speaker output).

| Problem | Possible Cause | Solution | | :--- | :--- | :--- | | | Input not selected. | Check if there is a switch selecting "RCA" vs "XLR" on the back. | | No Sound | Volume too low. | Check both the source volume (phone/PC) AND the amp volume knob. | | Red Clip LED | Overloading. | Turn down the amp volume. If the source device is at 100% volume, it may be distorting the input signal. Lower the source volume and raise the amp volume. | | Protect Mode / Cuts Out | Speaker wire short. | Check rear connections. If positive and negative wires touch, the amp will shut down to protect itself. | | Humming Noise | Ground loop. | Ensure audio cables are not running parallel to power cables. Try a different audio source. |