Before sending both amps in to find out which one is correctly biased and which is not, consider this.
They may be biased the same, but one has to work harder than the other. Could be for many reasons, but before we go there, just swap the amps with each other and see if the hot one stays the same. If the heat follows the amp, then send them both in for calibration.
They may be biased the same, but one has to work harder than the other. Could be for many reasons, but before we go there, just swap the amps with each other and see if the hot one stays the same. If the heat follows the amp, then send them both in for calibration.