I have to take care of some live sound soon, playing prerecorded music. I will be using this mixer, but it only has two main outputs when I need four to connect to the amps. I was planning to use the control room outputs for the third and fourth outputs, because using the alt 3/4 outs mutes the signal from the main mix. BEHRINGER: 1204 My question is, when the control room/headphone volume knob is at twelve o'clock, is that equivalent to no boost or cut in the signal? Will it be the same signal(in terms of volume) that is coming from the main outputs?