KHARPS Posted May 30, 2009 Report Share Posted May 30, 2009 (edited) Does anybody know how a center loading chamber effects tuning? I'm kicking around the idea of stepping up from 2-12'' lv4s to 4-12'' lv4s in my blowthrough. I'm picturing a pair on each side of the bed firing into a center chamber and having the port starting at the back of the center chamber with it 90'ing into each side. I've seen a few blowthroughs like this on here, chode's is one that stick out in my mind and also the one with the pair of 15'' BLs in the silverado. The part that is confusing me is does there need to be a relationship in size between the center chamber and the port size? I appreciate any help. Thanks. Here is what mine looks like right now: Here is what I want, except with 4-12s: That's jcm1689's box, hope he doesn't mind me posting it. Edited May 30, 2009 by KHARPS Quote Link to comment Share on other sites More sharing options...
KHARPS Posted May 31, 2009 Author Report Share Posted May 31, 2009 ttt Quote Link to comment Share on other sites More sharing options...
swervinburban Posted May 31, 2009 Report Share Posted May 31, 2009 I think there's a build in the members build section under RF tacoma with a similier box design except with six subs you maybe able to ack him for some advice!!! Quote Under construction soon to be: 2 DD Z9518's 8 lunar L1500's (500rms each) Secondskin Dampner pro 250a Mechman rhino alt 4 runs of 2/0 (installed) 4 batteries (installed) 6-5 1/4's, 2-6 1/2's, 2-4in all ma audio (installed) Link to comment Share on other sites More sharing options...
GoreMasterCustomAudio Posted May 31, 2009 Report Share Posted May 31, 2009 i got my 8 12 p1's faceing the center. tuned to 35hz and it more or less only plays stuff from 25 to 35 anything else it is barly audible. Quote I can't stop building!!! 4 DC LeveL 4XL 18 Blow Through Re-BuildThe newest addition My '97 Ford Explorer BuildMy First Build 8 RF P1 12's My Myspace Add MeMy Facebook Add Me oh, your a hypocrite too bro.....your mom has my name on her left tit - and you still like her dont you? If youre masturbating to that sub already, wait until you get a real sub... I think your nutsack will shrivel up. Link to comment Share on other sites More sharing options...
KHARPS Posted May 31, 2009 Author Report Share Posted May 31, 2009 i got my 8 12 p1's faceing the center. tuned to 35hz and it more or less only plays stuff from 25 to 35 anything else it is barly audible. That's what I'm afraid of. The size/length of the center section has to effect it somehow. Quote Link to comment Share on other sites More sharing options...
KHARPS Posted June 1, 2009 Author Report Share Posted June 1, 2009 anyone? Quote Link to comment Share on other sites More sharing options...
KHARPS Posted June 1, 2009 Author Report Share Posted June 1, 2009 ttt Quote Link to comment Share on other sites More sharing options...
Boon Posted June 2, 2009 Report Share Posted June 2, 2009 Look at Jack's Sleeper. AFAIK it plays pretty flat at extremely high levels across 20-60hz. You need to look carefully at wavelengths, if you make it too short then you risk cancellation. If it's long enough that you can get a full quarter wave cycle within the length of the box then you ought to be ok, at least that's my understanding of it... Quote 10.x volts fo' life! Link to comment Share on other sites More sharing options...
KHARPS Posted June 2, 2009 Author Report Share Posted June 2, 2009 Look at Jack's Sleeper. AFAIK it plays pretty flat at extremely high levels across 20-60hz.You need to look carefully at wavelengths, if you make it too short then you risk cancellation. If it's long enough that you can get a full quarter wave cycle within the length of the box then you ought to be ok, at least that's my understanding of it... Thanks for the input. Maybe I'll just try a 4th order then. Quote Link to comment Share on other sites More sharing options...
KHARPS Posted June 5, 2009 Author Report Share Posted June 5, 2009 Does anyone know how to insert a sketchup drawing on here? I put something together and wanted to make sure it would work ok. Quote Link to comment Share on other sites More sharing options...
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