Explains how to break the internal signal chain to insert external graphic equalizers, compressors, or advanced vocal delays before the signal hits the final power amplification stage.

Improper gain structure is the number one cause of muddy live sound and blown equipment. The QM4 features combination 1/4-inch and XLR inputs across four dedicated channels.

Many owners overlook the master patch bay on the front of the QM4. The unit comes equipped with a dedicated .