Really appreciate all the help and input here. What type of isolator are you suggesting? I have two 1000 CCA batterties in the boat on a battery switch and the existing Poly-Planar amp is wired directly to one batery I think. I also have a lot of other electronics being powerd in the boat while under way; 4 KW radar, 2KW sonar, and auto pilot.
One last question concerning the new Wet Sounds harware. For just beaching the boat with stern to the beach, will this set up produce good quality sound from about 100 feet to 150 feet away? Sometimes on the weekends at Shackleford Banks, NC, it gets crowded with boats beaching. I haven't really seen any boats with a high quality sound system that can project sound to the beach as yet. Most of the time, people are just turning thier sound systems up way beyond their capacity and they sound like crap. I hope this system will do the trick and shut down the crappy sounding music.
Again, thanks for everyones help.....