4th order questions

[99fullsizechevy]

Well, so far nobody has gotten back to me on designing me a box for my blowthru. I can pretty my h design my own ported box no problem, but I dunno where to start on a 4th order.. how big of a sealed chamber? How much.ported, how many sqin of port? Can I somehow port the inner chamber as well as the port into the cab? Would that make it a 6th order? How does tuning work on then compared to a reg ported box?

[dtleonard26]

Porting both chambers will make it a 6th order and you want to tune the ported side higher than a normal ported box mine is tuned to 45hz with 4cuft ported and 2cubes sealed

[99fullsizechevy]

Okay, I'm leaning toward doing a 6th order.. but if I want good response at 25-50 Hz but I don't want it not to hit all all on normal music? I want massive lows, so that's not a big.deal either way..

[dtleonard26]

6th orders are very difficult to build but if you do it right it could accomplish your goals but someone with 6th order experience should chime in

[99fullsizechevy]

Thanks for your help st least. I guessing for 4 cvr 15s, that would need 12-20 cubes per chamber? Or would it be different.. I think I could understand it more if I could find some solid material to.read..

[99fullsizechevy]

Is there anyone that can enlighten me on anything?

[cc_audio]

Got some dimensions? I can draw you up one, PM me and I can send you a pretty in-depth write up on 4th orders.