I just changed my head unit and it was a major difference for me. Before top down I had to crank the stock unit all the way up and I still could just barely hear it. Now, never have to go past half way and I hear it a lot better than the stock unit.
Monsoon setup ?
Magnaflo Redline dual exhaust
Werks Turbo @ 10 PSI
KappaSphere coil springs and rebar
ZOK anti-sway bars
DDM Works Latin Venom front brace, Pro Beam, Racing Back Bone