bass cube i believe it’s called, there is probably different names for it. it’s a volume control for your amp. runs thro like a phone wire almost. i don’t have one, it’s built into my deck! i watched my buddy install his and it worked good for him.
hahaha, Sol all you really have to do for now if you want to run your factory speakers of your OEM deck is to add a Cap to each speaker. That will filter out all the Low frequency’s. Add me too MSN, I can help you better there.
I just had it at another Quiznos… it was pretty damn good still. Now I’m looking forward to yours lol. Let me know when you’re working 