Ensure speaker cables are locked securely into both the QM4 rear panel and the speaker inputs. Issue 3: Heavy hum or buzz in the audio mix
(Note: Specifications may vary slightly depending on the specific revision or manufacturer batch. Values below are standard for the QM4 series).
: High-impedance line-level connection. Use this for keyboards, electronic drum modules, acoustic guitar preamps, or mobile device audio playback (via a mono-summed adapter).
Built-in global analog spring reverb with an external Effects Loop (Send/Return).
Adjust the remaining knobs to blend the other microphones into the mix. Operating Requirements and Limitations audio choice qm4 manual
is a "budget" professional audio system designed for small venues, band practice, DJ gigs, and karaoke. It is known for being rugged, lightweight, and easy to operate. Power Output : 100 Watts RMS at 4 ohms. Channels : 4 independent channels.
If you are experiencing issues with a specific component or want to explore advanced wiring options, please let me know:
The Audio Choice QM4: A Comprehensive Guide to Your 4-Channel PA System Audio Choice by Sound Tech QM4
To protect your internal circuitry and connected components, always perform system connections in a specific linear sequence. Ensure speaker cables are locked securely into both
Keep the low (around 2 or 3 ) while setting initial levels.
Avoid suspicious "free manual" sites that require credit card information or installing software. The official manual is always free.
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.
Ensure your vocal microphones are positioned behind the front plane of the PA speakers. If a microphone points directly at a speaker cone, an instantaneous feedback loop occurs. : High-impedance line-level connection
: 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.
First, let's clarify what your device is. The Audio Choice QM4 is a product of Soundtech, designed as a self-contained portable PA system. For many users, the "Audio Choice QM4" experience includes not just the mixer/amplifier head but often a pair of passive speakers with 8-inch woofers and tweeters. This "in a box" portability was a major selling point, making it an ideal all-in-one sound system for those who needed simplicity.
This is normal for passive mixers. Increase the volume on your destination device.