I have a Mesa Boogie 4x12 amp and obviously it can go very loud during recording (or in my case re-amping). Don't want to disturb the neighbours too much.. Now I remember someone saying that there is a way to only use 2 of the Mesa's speakers instead of the 4. That would help a lot in keeping the volume down. The cab has an additional input that says 'split for stereo or bi-amp'. Is this what I'm looking for? Any help is greatly appreciated, thanks!!