I have the becker pre out lead connected to my Symphony HU. It has 2 pre outs. I have two 2 channel amps (one pre out for each). One amp is running the sub, the other is running the speakers. Now when i use the fader i can cut down the sub or the speakers as i wish. However when i change the balance it also effects the sub. (If i change the balance fully to the left, the sub level also goes down a fair amount). Should this be happening? Is there any way to stop this happening? I can't figure out how the balance level effects the sub.