-4 gauge power and ground
-14 gauge speaker will all around will be find
-speakers dont have powre and grounds...they are just labeled + and -
the only thing that goes to the battery is the wire that powers the amp. yes you NEED a fuse near the battery, and maybe on your D-block if you like
-to determine the size of the fuse, take a look at all the amps that are going to that line. add up the size of the onboard fuse, and that should be near the battery, within 18"s
-3 sets of RCA for the amp
thats like a really basic overview
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