posted
When building a sealed box let say (ext dim.) 15x14x42 for 3 12s is it better to have the box with fewest parrallel sides becuase of cancelation?? i am sure (for the most part) not to have a perfect cube because you will have bad cancelation. My Friend Kevin has 3 MTX 6000 12s and needs a box. so with that box 15x14x42 its around 3.8 cubes with bracing and dividers. which would be perfect. Should reconfigure the box to be less square or rectangular and try to be more trazezoidal??
Sorry it's such a simple question but i haven't built a box since June and i forgot. any input please.
-------------------- '92 Sierra-Euros, 5% Tint, Hmm.. lets think: Nothing everything was stolen and i dont have full coverage..
for sale (my friends mentioned they wanted to sell) NIB Tempest 15 JBL 1200.1 used for 2 months sat for 6 months CFA-1000D email me if you are interested and i will let you know if they are still around.
Posts: 430 | From: Painesville, OH USA | Registered: Nov 2000
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posted
The shape of the box does not matter as long as it has the correct internal volume. Subwoofers play too low to have standing waves and/or cancellation unless the box is huge.
Posts: 327 | From: Pleasanton & Sacramento Ca | Registered: Dec 2001
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posted
I don't know the exact rules, but I have heard to stay away from perfect sqaure boxes, and also to mount woofers off-center.
-------------------- (1) PPI AMP PCX-2200 (800 Watts @4ohms Bridged) PCX-480 for my highs (2) DD 3512a's in a 4.4cube box with 50sq. inches of port tuned to 33Hz Street 1-2 [TEAM DD] 147.7dB My Sound Domain page Posts: 1655 | From: Tucson, AZ | Registered: Jul 2001
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posted
i have made two perfectly cubed boxes each 1.0ft sealed and both seemed to hammer hard with not signs of the bass being cancelled out infact my single aw1005 with 800 watts is louder than two 10" pioneers with 150 watts each i know its more power but if there was alot of cancellation it sure was very very minimal.
-------------------- Premier Deh-P520 Cadence A2 CDT Euro ES-620's in front Thieves Suck!! Posts: 1081 | From: North Cal | Registered: Jan 2001
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posted
I don't think you will have to worry about cancellation unless you have a 15 ft long box or something, but then again, on JL's site it says something about not using a cube and using braces to break up standing waves.
-------------------- Infiniti Qx4: Pioneer P930 H/U, Epic150, MTX8100d, 2 Alpine TypeR 12 SVC's with 1.28cuft tuned to 31hz, JL XR6.5 components (JL 300/4)/VR6 Coaxials (Other half of 300/4) F/R, 1 Farad Stinger HPM Cap, 2 Optima Red-Tops (Soon to be 3), 0/1 Gauge Stinger Wire, All Stinger HPM Fuses and Fuseholders, Cold Air Intake, HKSuv Sport Exhaust, Ignition System
148db's at 45hz... Posts: 239 | From: Mobile, Alabama | Registered: Mar 2001
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