I have a two seat xp900, looking at doing a 5 channel amp, 4 6.5 speakers and a sub under the dash. I believe I’ll need to run a second battery and an isolator. Can someone give me some advice on the isolators and how big a second battery I need? Also considered doing a head unit over the Bluetooth controller I have currently. Thoughts or advice from those who have built theirs in the past? I picked this up I’m going to make an enclosure for.

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