Nothing ruins a background music system faster than a persistent 60Hz hum. Commercial amps like the QM4 often have specific grounding requirements to prevent this.
: Use high-quality XLR cables for microphones to minimize interference. Ensure "+" and "-" strands never touch to avoid short-circuiting the amplifier. Troubleshooting Common Issues audio choice qm4 manual better
The QM4 instruction manual emphasizes several safety parameters to protect both the user and the gear: Nothing ruins a background music system faster than
: Extreme volumes can damage hearing and loudspeakers. Always turn the Main Mix down before switching the unit on. audio choice qm4 manual better
The QM4 is most stable at 4 or 8 ohms.