Sorry for the delay been working. I typically just play in cabin speakers on the beach I have tower speakers wired into acc. switch. I have 2 batteries total they are wired in parralel so no switch or dedicated accessory batt. I will remedy this issue soon.I plug these batteries into a battery tender when boat is out of water. I had a kicker zxm450.2 running my tower speakers and a 4 channel alpine running in cabins Kicker amp went bad and HIFI sound connection didn't have a replacement so they gave me an in store credit so I was thinking about getting a 5 channel amp to run in cabins and sub and still use a 4 channel Alpine amp I already have in the boat to run my Kicker tower speakers. Would this be a better option than running 3 separate amps in the boat (sub, in cabins. towers)?