Do you mean the "INPUT" gain? The outputs are plenty hot for anything I've even needed.
no Dave .....output gain....with the PA3x I had to boost my master on my speakers vol overall to 3 o'clock from 2 o'clock which I used on the PA500. Pa3x master is already at 3/4 up during performance. Wonder if using NO mixer causes this also. with no preamps.
The MAXX audio VOL should do this ?