I'm looking to biamp my Yamaha S215C speakers. I was at my friends club a week or so ago and heard his S115v tops that he has biamped and I could not believe the sound. They made my head hurt from the SPL. I know I can easily by pass the passive cross over which is what I was going to do tonight but when I opened the cab I noticed that there were three outputs on the cross over. There was the horn and an out put each for the 2 15in mids. Dose any one have any idea why this would be?