the fact that saying "gain" turned all the way up means you dont know **** about car audio or tuning. Clipping is a wonderful thing when that happens.

Depth of the port results in the tuning frequency..... the rest follows, anyone knows ported you run a sub sonic filter.

As for DVC and SVC lololol. Same dam sub, except 1 has 1 voice coil, the other has 2. DVC you have alot more wiring options
500 watt SVC is the same as a 500watt dvc except the DVC is 250watts PER coil. You can be cool though with a dvc and run 2 amps on 1 sub (each coil has its own amp). I did that in highschool. I dont think you know a dam thing about car audio man.

Oh p.s I think my gain is set at 35%, ***** ROCKS.
PPS leave your bass boost at 0 k thanks bye