Bet he's going to have some major hearing loss plus the added bonus of turning his internal organs to mush.had a 1965 Chrysler Imperial that had reverb unit in back. That made for some really great tunes for that time. Unless you hit a good hard bump and the springs started hitting each other... I tried transplanting the system in other cars but it just didn't sound the same.
Last night I stopped for gas and there was a newer Impala next to me with the music thumping and banging. when he got in and turned it up, the trunk started to vibrate so much it popped open. He got out and said it does that sometimes. What a waste of money!