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[ss3079 5,000+ posts]

Do a quick search on bandpass box's, you should find some interesting things.

They sound like crap, most of them

They are loud at certain frequencies, most of them.

A well though out, ported or sealed box is perfectly fine.

I used to run a bandpass box, it was built exactly to spec and it took me a while to complete. Of course it sounded good and was pretty loud, but the driver needs to be designed to be thrown in a bandpass box(and the box needs to be built exactly to spec...they arent forgiving)

- Steve

 

[Gauntlet 5,000+ posts]

Because they have very limited frequency response, they have to be built exactly to the subs specs and they have to be built perfectly, and the push/pull effects puts a big strain on the driver.