I had a local guy wire up my back speakers today and put XM in the boat--he said that the boat was pre-wired for back speakers but the wiring only went to the throttle?? Made sense to me, with all of the threads on here about wiring up the back speakers and the purple wire, I couldnt figure out why my purple wire went to the throttle.
I took out the crappy Sony 1610 speakers and replaced them with Infinity Kappa speakers--the difference is amazing--had I had known just how crappy the stock speakers were, I would have donated them for fish reefs my first trip out. I wasnt wanting to blast out on the water, but its nice to hear your music w/o blasting your speakers to a fuzzy noise.