I'm in the process of changing my system out. I will be running a singe IDMax 10" sub being ran by a JL Audio 500/1v2 amp and my front door components will be ran by a Boston Acoustics GT-275 amp (which puts out 75 watts x 2 ch). I will be getting the 4 gauge Knu Kolossus OFC amp kit and their fused distribution block. Both amps recommend 4 gauge wiring so I was planning on doing 4 ga in and out of the block if that will be okay? Then my other question is what size fuses would be best for this application? I believe the JL recommends atleast a 60a, if that's right? Then also what size would be best for the BA 2 channel amp? My car is a 09 Nissan Sentra with factory electrical and stock battery, if that makes a difference. Thanks for the help.