I have 2 amps... A 600W Kenwood and a 500W Lanzar Vibe. Both manuals recommend 8 gauge power/ground wiring. Would it be okay if I used 4 gauge wiring from the battery to the fuse block? And then either 4 gauge or 12 gauge from the block to the amps? My fuse block says one 4AWG input to two 8AWG outputs.

Also, would 4 gauge be right for the ground wires also from both amps? And can I connect both ground wires to a single ground???

Pardon my ignorance on these matters, thats why the forums are here!!