Audio Choice Qm4 Manual
The is a rugged, vintage 4-channel powered PA mixer head engineered for live performance, small venues, rehearsal spaces, and karaoke. Delivering 100 watts of power , it provides a highly reliable, all-in-one solution for mixing multiple vocal microphones and instruments.
: Low-impedance port dedicated to dynamic microphones. Do not feed phantom-powered condenser mics into this port unless utilizing an external 48V inline power supply.
Use the Master Graphic EQ to identify and slightly drop the offending frequency slider causing the ring. Troubleshooting the QM4 Issue 1: The unit will not power on
The right-hand side of the front panel governs the combined sum of all inputs: audio choice qm4 manual
is experiencing technical issues, use this systematic checklist before seeking professional board-level repair: 1. No Power / Power Light Unlit : Ensure the outlet is live.
First setup — get it playing fast
Connect microphones (XLR) or instruments/line sources (1/4"). The is a rugged, vintage 4-channel powered PA
Allows you to connect external effects processors (like a separate delay or EQ unit).
The QM4 is typically a 19-inch rack-mountable amplifier designed to run four separate zones (or channels) of audio.
Verify the and active channel volume knobs are turned up past zero. Do not feed phantom-powered condenser mics into this
The Audio Choice QM4 manual provides detailed information on the amplifier's features, which include:
| 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. |
Concise feature notes
Connect your speakers (e.g., 10" enclosures) to the rear Speaker Outputs.
For zero latency (gaming or video editing), use the included 3.5mm cable.