I added a single 12 in the trunk with a 500 watt amp. I used a line output converter on the rear drivers side speaker..This has been the hardest car I ever put a amp in..Finding a entry point on the firewall proved to be a challenge also. Ended up following the harness that supplies the fuse box and ran along next to it. But yeah it sounds great and it's not over powering bass with just 500 watts.