Audio Choice Qm4 Manual [2021] Jun 2026

While an official datasheet is not widely available, the following specifications are common among amplifier heads in this class and consistent with the QM4's design:

Verify that the Master Level knob on the front panel is spun entirely counterclockwise to 0 or Min before flipping the power switch.

In addition to the four independent channels, the mixer provides central controls on the right side: audio choice qm4 manual

Ensure the QM4 head is plugged into the same electrical circuit breaker or power strip as your external gear (laptops, pedalboards). This prevents competing ground paths.

It is designed for low-impedance (Lo-Z) microphones. Using high-impedance equipment may result in significant signal degradation or noise. Troubleshooting While an official datasheet is not widely available,

Yes! Plug your guitar into any of the . Remember that the QM4 is a PA amplifier, not a dedicated guitar amplifier. It lacks built-in guitar amp effects such as overdrive, distortion, or amp modeling. You can use an external multi-effects pedal between your guitar and the QM4 to achieve a full, usable guitar tone.

: Adjust your individual channel levels to build a cohesive mix, using the 3-Band Master EQ to compensate for any unwanted room acoustics. Technical Troubleshooting and Maintenance It is designed for low-impedance (Lo-Z) microphones

Place the QM4 in a well-ventilated area. The amplifier generates heat during operation and should not be stacked with other hot-running gear or placed in an enclosed cabinet. The unit is built to a standard 2U height for mounting in a professional audio rack.

The QM4 features a robust power output of 200 watts per channel, making it capable of driving a wide range of speakers. Its high-quality components, such as the toroidal transformer power supply and the use of discrete transistors, ensure a clean and stable power delivery.