Audio Choice Qm4 Manual Better

If you have this vintage 4-channel powered mixer head (often paired with passive PA speakers): Impedance Matching

The original manual lists included parts poorly. Here is the better list:

: Feedback happens when a live microphone picks up its own amplified signal from the speakers. Position your microphones safely behind the front plane of the speakers, and use the Master EQ to drop the high or mid frequencies until the ringing stops. audio choice qm4 manual better

: Controls warmth and kick. Boost slightly for karaoke backing tracks; cut slightly for speech microphones to prevent muddy audio.

is a 4-channel Class D amplifier designed to offer a balance of compact size and high power output. It features dedicated crossover adjustments, gain controls, and input sensitivity settings for each pair of channels, typically used for front/rear speakers or front/subwoofer configurations. If you have this vintage 4-channel powered mixer

: Safely route external processors through the onboard Effects Loop. Audio Choice QM4 Core Technical Specifications

: Use the 3-band Master EQ to balance the high, mid, and low frequencies for the entire mix. Monitoring CLIP indicator : Controls warmth and kick

: Adds crispness and air to the audio. If your speakers begin to screech with high-pitched feedback, dial the High EQ knob down immediately. Working with Spring Reverb and the EFX Loop

) to vocal channels to improve speech intelligibility. Avoid boosting acoustic guitars here to prevent harsh pick noise. Mid Frequency (

The QM4's most divisive feature is its automatic source switching, which prioritizes inputs based on active signals. If you have a TV on Optical and a music streamer on the RCA inputs, the soundbar might jump between them unexpectedly.