Hey guys, Excuse my ignorance if this is a no brainer but after reading some posts it made me question myself. This is what I am or was planning on doing. I want to keep my factory radio and add a 6 channel oem interface processor. I am planning on 3 of the same 2 channel amps for the entire system, 1 stereo for front stage 1 mono for sub and the other one is where I was trying to be creative and my question comes into play. I wanted to use 1 channel for my front center channel coming out of the processor and the other channel I wanted to connect my rear parallel for rear fill and to do this I was simply going to use a y connector coming out from the 2 rear channels out of the processor to get 1 "mono" signal. The reason that I question myself is because from the posts that I have read on using "mono" rear fill have said that the only way to accomplish this is to bridge your amp and if you couldn't do that then you would have to find a processor that would run mono rear. Again, I'm sorry if this is a dumb question but using a y adapter to get a mono signal to my amp is what I had planned for rear fill until i read those posts.