Honestly I think it is set up right, but my stock alt is only 60 amps and it's on it's last leg ATM. When I say it clips, I mean I think it could sound better, it's not that my sub is going crazy making horrible distorted bass like 90% of teenagers do. I've read into tuning before but I'm always open to learn more.
I guess what I'm trying to ask, is if I had the 500 tuned optimally in a perfect case scenario, and then switched that out for this zapco and set that up optimally, and played the fanciest trickiest ultimate sq/sql bass tester song, would the zapco take the cake, or would the fosgate be right there with it?