Please help. Im am installing this system in a boat. I have 4 Polk MMC Momo650 speakers to install on ft channels powered by Clarion APX480M amp,2 Polk Momo690 speakers for rear channel powered by Clarion APX280M amp and 1 Bazooka 10inch 200watt powered tube sub. I have never installed a stereo before, could anyone help with detailed wiring help. My biggest questions are do I run 2 signal cables from the HU to the ft speaker amp or is there a way of splitting the signal at the amp? and also the Sony HU I would like to use has 2 pre amp outs. 1 FT and 1 RR/sub selectable, where do I get a sub signal if I use the Rr channel to the rear speaker amp? Sorry for the long post. Any help appreciated.