Tower Speakers Help

[Romaswake]

Hey all,

I'm thinking about installing a set of tower speakers to my 2002 Maristar 210. Right now the only after market products in my sound system is a new Sony head unit. I'm just trying to get a feel for how much it would cost and to what extent of work i would have to put in. I would really like some kind of speaker bar like this ( http://liquidaudiosounds.com/4-x-4-l...nits-p-58.html ) I know i would need a 4 channel amp for it, but is that it..? Right now i only have one battery in my boat, would i need another? Also, what kind of wire harness would i need to accommodate 4 more speakers to my system?

Thanks,
Spence

[gatorguy]

Tons of info on here already if you spend a little time reading.