Here is what I am currently running in my trunk, (2) Rockford HE 10"subs in a custom box that used to be in my '99 Camaro SS. And there is still enough room for my son's hockey bag and stick. They are being powered by an Alpine MRP450. I also have replaced all the door speakers with Infinity Kappa 62.9i's. These mods have improved the sound in the car 110%.