I have never done anything with adding 2nd batteries, so I am a complete newb in this area.
My friends dad want an updated system in his boat. It's a 96-97? Searay. It just has an old marine HU and 4 coaxials (5 1/2's?). One side is blown. He wants a new HU with iPod capabilities and new speakers. I meantioned a 2nd battery would be a good idea, cause I planned on using an amp or two. He thought that was a great idea. I would like to have the amp and HU on the 2nd battery, both batteries charged off the alternator, obviously. I've never installed an HU in a boat, is it much different than a car? Is it east to rewire the power wire to a different battery? I just got the budget today, it was alot less than what I was hoping. He said $5-800. With a new HU, 2 sets of replacement speakers, 4 channel amp I'm already at about $650. Is there room in this budget for a 2nd battery? What components do I need and how do I install them? I was initially planning on a sub and sub amp, but budget cut that out.
He really liked the idea of a 2nd battery just for the system, so I think he will make that work no matter what the budget is.
Any help would be appreciated.
My equipment I plan on using so far:
HU: Clarion DXZ785USB (for iPod use) ~$230 shipped
Component Amp: Alpine MRP F550 ~$200 shipped
(Found matching Eclipse amps on Ebay too, XA1000 and XA4000. There efficiency should be great for this setup. About $340 shipped for the pair! If budget alows a sub, otherwise just the 4 channel for $190 shipped)
Speakers: 2 pair Elemental Design 6000v.2's They can be mounted with tweeter on woofer as coaxials. ~$200 shipped (I'm open to suggestions, I don't think I could fit seperate tweets and woofers, maybe I could with ~5" mids. Considering no sub, the easily mounting 6.5" from eD looks like a good fit.)
(oh yeah, I will get specifics but it's a GM inboard motor.)