Alright I can't thank you enough for all the help. Hopefully I won't destroy this sound system like I did the last.

 

What type of battery isolator should I have? I've been looking for a while and all I can find for 300 amps is a diode isolator from Sure Power which is 400 dollars. Would I be able to use the Stinger isolator rated for 500 amps? Also, where do I find inline fuse holders for 2/0 gauge cable? I've been looking for these things for hours with no luck.

This just keeps getting more and more expensive so I'm thinking maybe I should just use one battery and have two runs of 1/0 gauge from the battery to a distribution block in the back with four 4 gauge outputs.

 

stinger is fine, almost any ANL fuse holder will work

 

Depending on the style on anl fuse holder. If it's the tube style it won't work, you need the kind that accepts ring terminals on both ends, you can pick them up for around 10 bucks on ebay. And I hope you know good 1/0 wire isn't cheap anyways if you decide to go that route. You can't use just any brand, if it's really cheap chances are it's more like 2 gauge with a really oversized jacket. Expect to pay upwards of 2 dollars a foot for cca and somewhere around 4-5 a foot for ofc.

 

I buy all of my car audio wire here

http://www.knukonceptz.com/car-stereo-audio-cable.cfm

Not the cheapest but its my preference.

 

Knukonceptz, stinger, kicker, rockford, and shok wire are all some good brands of wire.

 

Okay I'll probably get it from KnuKonceptz. What gauge speaker wire should I use for my subwoofers?

 

10-14 would be the best, of course the lower the number the bigger it is so it does get kinda harder to work with.

 

Alright I have 12 gauge Orion speaker wire so I'll just use that.