: Set all gain, level, and EQ knobs to zero (or "unity") before powering on to prevent sudden loud feedback or speaker damage.
: Use the 1/4" jacks for guitars, keyboards, or media players.
The (often referred to as the Audio Choice by SoundTech QM4 ) is a versatile 4-channel powered mixer designed for portable PA applications like karaoke, DJ sets, band practice, and small room presentations. Audio Choice QM4 Technical Specifications audio choice qm4 manual
Understanding the hardware is the first step to mastering the manual. The QM4 is a rugged, compact unit often sold as a bundle with speakers. : 100 Watts at 4 ohms. Channels : 4 individual input channels.
: Turn on the mixer first, then any external power amplifiers if used. When shutting down, reverse this order: turn off amplifiers first, then the mixer. : Set all gain, level, and EQ knobs
: Adjust the Gain for each channel until you have a strong signal without clipping (distortion), then use the Master Level to control the overall volume. Troubleshooting and Maintenance
: Ensure the mixer is turned off before connecting any power source. Channels : 4 individual input channels
While a physical "Audio Choice QM4 manual" is often missing from second-hand listings, you can follow these standard operating procedures for 4-channel powered mixers:
: Each channel features combination XLR and 1/4" inputs. Channel Controls : Gain, tone, and reverb per channel.
: Connect your speakers to the output jacks on the rear of the mixer. The QM4 typically pairs with 2-10" enclosures. Input Configuration : Microphones : Use the XLR inputs for microphones.
