Because Audio Choice amplifiers are often considered "vintage" or "discontinued boutique" gear, several classic car audio archives hold the file.
Locating a single, official PDF manual for the "Audio Choice QM4" is difficult, but the provided resources offer the next best thing: direct links to relevant manuals for similar hardware and valuable community insights. audio choice qm4 manual link
Detailed high-resolution photos of the front and back panels, which often serve as a visual guide for port functions (XLR/1.4" inputs, EFX loops, and EQ settings), can be found on eBay and Reverb . Key Features & Technical Specs Power Output: 100 Watts. Inputs: 4 channels with combination 1/4" and XLR inputs. Control Section: Individual Gain, Tone, and Reverb controls per channel. Key Features & Technical Specs Power Output: 100 Watts
Bring the knob up to roughly 50% or "unity" gain. Bring the knob up to roughly 50% or "unity" gain
Note: If the above link does not work, it is recommended to search for the manual under "SoundTech Professional Audio" or "Audio Choice Portable PA." Getting Started: Setting Up Your QM4
: Frequently contain photos of the original back panels and control layouts, which serve as a visual reference for setup.
Swap out the 1/4" cables; ensure the mixer is connected to a grounded wall outlet. Channel clipping due to high input levels
