sounds pretty damn good! It's definitely tuned to 30hz hahah...the higher notes are there but the roof resonates bad above 45-50hz. He needs some @Second Skin for sure. He really needs his truck back though. I will have to gather some deadener for him and bring him in for a quick little deadener job. The roof is the worst part though, if you hold it with your palm it's actually really nice! Highs are good too! Set with a DD-1 and CC-1...we are good