These controls can be disabled using DIP switch #1 on the back panel. Keep in mind that if the volume controls that are currently stored on AmpTraXX were configured using RS-232, the front panel knobs may not be anywhere near the current values. For that reason, ask yourself a few questions before changing this DIP switch:
1. Would someone else kill me for fiddling with the volume controls?
2. Are the volume controls in a reasonable location (ie. not at full volume!). As soon as you flip the switch, the volume levels of each channel will be acquired from the front panel knobs.