Quote Originally Posted by Wylietunes View Post
In regards to alternator supply, this configuration leaves you open to isolating the house bank from the alternator, when the engine is running. 2-3 hours of this, before or after anchoring, and your house bank is in a serious hole. Any alternator will struggle to get out off. If you rewire the audio B+ to the common post of the switch, the audio system will always see input from the alternator, regardless of whether the switch is on one or two. If the house bank was run very deep while at anchor, you can leave the switch on one, and isolate the alternator from it. Audio still works as its seeing alternator voltage and you can recharge the house bank back on the trailer. With this config, you can still run the stereo off the large house bank and still isolate the main cranking battery from the stereo. The other benefit, when you turn the switch OFF, all voltage is disconnected from the amp. OFF is off, no parasitic current draws when stored.
I prefer this. I will be moving the amps and batteries and battery switch around this spring and will re-wire this way. Thanks a lot!