Bandpass design for two American bass tnt 12's

[Jerm1400]

I have a buick Century with the big 3 done and duracell g34 under the hood and a duracell g31 in the trunk. I'm running two American Bass TNT 12's in a 4 cubic feet box tuned to 33hz. I did 140.3 DB with a Re Audio dts.1500 and I just switched to a Sundown saz 1500v3 it sounds louder by ear and a lot cleaner my goal is to hit some where from 145-147 db and I was wondering will doing a bandpass help me achieve that goal? I've read the forums and seen mixed reviews saying that a bandpass wouldn't really help any help would be greatly appreciated!

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[Jerm1400]

No one has any input at all?

 

[LosIsATool 5,000+ posts]

There is no definite answer. It might or it might not. Trial and error at this point.

 

[Jerm1400]

There is no definite answer. It might or it might not. Trial and error at this point.

Ok another question would it be worth it switching from the saz 1500 to the q1-2200?

 

[LosIsATool 5,000+ posts]

Not really. 3500 would be