i'll try to explain it , remember i'm from south missippi ! if the mixer has a tone generator connected to input 1 and the mixer is putting .5 volt signal to the amp and the gain on the amp is at max then the amp will be sending that .5 volts through the input stage. if you turn the gain on the amp to the "half gain" mark then the sound level at the speakers will be reduced. if you increase the output voltage at the mixer to 1 volt and leave the amp at half gain the sound level at the speaker will increse. if you also turn the gain on tha amp back to max the sound level at the speaker will increase even more. i hope ya'll understand watt i just posted.
