Shielding for power/inputs in same box

Hi all - due to a subwoofer installation, i really need to run both power and input/output low voltage lines into/out of the same box. I can separate them pretty well before the box, but, obviously they will be close inside. I was thinking of a copper divider between the two and maybe some of that "armoring" around the low voltage cables right before the box. Any ideas are appreciated