fuse block

For starters here is my setup Subwoofers: 2 10” Kicker Comp R’s 800 watts (peak) per sub 400 watts (rms) per sub Amp: Lanzar Heritage Amp 2000 watt 2-channel bridgeable Ran with a 9.5mm power wire which I believe is 4 gauge. So my issue is whenever I listen to music with the subs if I play...