The Audio Choice QM4 is a classic four-channel power amplifier often found in vintage professional audio racks and mobile DJ setups. While it was built to be a workhorse, finding a physical manual today can be difficult. Understanding the manual's specifications and operating procedures is the only way to ensure "better" performance and prevent hardware failure.
Fine-tune the overall High, Mid, and Low frequencies for the entire mix. audio choice qm4 manual better