i have got hold of a genuine sub but my car only has the basic mid buisness head unit at the mo, but hoping to fit an after market replacement.
my question is will it be plug and play straight away or does it only work with the dsp unit?, noticed there is a connector where it goes.or has anyone opened one up is there a built in amp inside ? or is it as easy as just wire up to speaker wires inside?also is there a special cover with grill for these or do they sit behind the blank original????
p.s would have loved one of x555's enclosures with a focal sub as these speakers are awesome. but this was cheap so will give it a go with any help offered

thanks guys