Audio Choice Qm4 Manual Jun 2026

Governs the overall wetness and return level of the internal reverb tail.

Low-impedance port dedicated to dynamic microphones. Do not feed phantom-powered condenser microphones into this port without an external supply, as the QM4 does not supply native +48V phantom power.

: Over time, dust enters the potentiometers, causing a crackling noise when adjusting volume or EQ. Fix this by powering down the unit and spraying a small amount of electronic contact cleaner (such as DeoxIT) directly into the pot gaps, then rotating the knob back and forth 30 times. audio choice qm4 manual

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Ensure you are not sending a line-level signal (like from a CD player or keyboard) into the mic inputs, as this will overdrive the internal transformers. Governs the overall wetness and return level of

Connect your microphoning lines via XLR and your instruments via 1/4-inch cables into their respective channels.

Each channel features combination XLR (balanced) and 1/4" jack (unbalanced) inputs. : Over time, dust enters the potentiometers, causing

The is a vintage, highly portable 4-channel, 100-watt powered PA mixer head designed for live performances, rehearsal spaces, karaoke, and small-venue public address applications. Known for its rugged Tolex-covered modular form factor and dependable analog mixing workflow, this manual provides the essential instructions needed to set up, operate, and troubleshoot the hardware safely. Hardware Overview and Control Panel

: Verify the rear fuse hasn't blown. If the power light turns on but no sound emits, verify that your speaker cables are completely inserted and that you are using fully functioning passive speaker cabinets.

Slowly turn the clockwise until the audio reaches the desired volume in the room without causing distortion or audible clipping. Routine Maintenance and Troubleshooting Vintage hardware like the Audio Choice QM4 requires periodic attention to remain operational.

Play a recording of a cryptic message from the lab's director, Dr. Emma Taylor. B) Listen to a tutorial on quantum mechanics and its applications in the lab. C) Hear a ominous warning from an unknown source about the dangers of the lab.