Okay so I finally got everything for my build. I'm going with a MB Quart DSC 2000.1d to power 2 10 Alpine Type-X (will be giving each 1000w rms @1ohm). I also bought 2 MB Quart DSC 480 for my interior speakers. One will power RE Audio 6.5 Components and the other will Power 4 6x9s. I have the following questions. I currently have a Pioneer Avic N3 and want to know how many sets of RCAs can I get away with; I currently have a set for the subs, front, and rear. Can I run one set of RCAs to each 480? They can be switched to 2 channel input mode; so I figured I could input RCAs for 1&2 channel on each amp. Will placing amp in channel input mode act like bridging channels? Any input/advice/suggestions appreciated. Thanks.