[QUOTE=RL67037;684599]I connected mine to the black wire of the door speaker and they work great.

Used non-polarized, 100V, 220uf capacitors.

I also attached them with quick-connect spade type connectors so I can change capacitance (if needed) without cutting any more wire out of the door.

Worked fine for me

RL[/QUOTE

Did you do anything to the subs??