i had these in my last car and they are very loud but mynew car has a gooding these on it comes with a Kenwood 800W amp which is good enough to tun the subs and a small mutant amp ready for 6x9s. it also comes ready wired so just need to run a couple of leads through your car and job done.one corner off the box had a patch of coth missing but you cant tel when its in the car