If you're gonna make all your power cable to 0 gauge, then make sure your ground is 0 gauge as well, it'll coordinate better because you're giving it freedom on 1 end, then choking it on the other :-[...dont worry about your remote wire..and in terms of speaker wire, it all depends on what you run..if your running psycho stuff like MTs or BTLs or similar, then you can go down to 4gauge speaker wire...i am running a T1 12 and i use 8 gauge speaker wire..and 14 gauge for my speakers for 4 channel.. I could even use 12 gauge for my sub to amp, and 18 gauge for speakers without loosing a lot of flow..hope that helps