I am getting ready to build a system for a chrysler 300c and was wondering what you guys think would be louder in this application. 3 sa 12s sealed firing in the cabin or 2 sa 12 ported. I am planning on running a z 2500on the subs.

I dunno the output of the z2500, so I'm assuming 2500 watts, if you are talking about he saz 2500, then I would do 3 sealed, dual 2 ohms coils, wired in series to 4ohms, then the 3 in parallel for ~ 1.3 ohms.

If you do 2, I would do either or both of these few things, build a smaller box, a slightly small flared port, tune low, anything to keep these from unloading too much. Or I'd wire the dual 2 ohm coils in a series parallel to get 2 ohms. If that amps rated power is at 1 ohm.

You could get two subs w/ dual 4 ohms coils to get 1 ohm load, but run the risk of damaging the subs (maybe from mechanical before thermal), as they are rated for 600 watts.

You could do three with dual 4 ohm coils, wired in parallel to .66 ohms, if you have the saz 2500 and a beefy electrical. (HO alt, big 3, multiple batteries, 0 gauge to the trunk)

For burps, but I don't recommend that for a Daily driver, as you be putting a lot of stress on your equipment and something is bound to fail.

So, it's your decision, how much money do you have to throw around?

Most applications when shooting for output..

Ported > Sealed.