cherojeep96 Posted October 23, 2014 Author Report Posted October 23, 2014 I believe your sealed section should be at least 2 cubes. The sealed sections are to seperase chambers and are at 1 cu each so it's 1 cu for each sub and the ported chamber is 3 cu after port displacement so in my head that's a 3:1 ratio 4th order unless that's not how that's calculated
philrab Posted October 23, 2014 Report Posted October 23, 2014 Net ported airspace / net sealed airspace. So, you'll end up with a 1.5:1 ratio box. 2015 Toyota Tacoma Build Thread 2007 Mazda 3; 5000K HID's, Kenwood Excelon KDC-X997, Infinity Reference 6.5 comps in front and coaxials in the rear doors, JL 320.4 four channel, Rab Designs built ported enclosure with an SA12, Kenwood monoblock, Redline Leater shift boot/e-brake boot/center console cover, JBR short shifter/shifter bushings/rear motor mount. Build Thread 1996 Mazda Miata: Kenwood Excelon HU, Alpine speaker in the doors, Clearwater (miata specific) headrest speakers. 1994 Mazda Protege: Kenwood Excelon HU, Infinity Reference 2 ways all around, 2x RF Punch 10's in ported boxes.
thefourth Posted October 23, 2014 Report Posted October 23, 2014 Okay the way I read it was wrong. I thought you had .5 per sub. Lol carry on Thanks alaskanzx5 I might just do thatI can recone a sub myself. About a year ago I took 2 12" power acoustic mofos and made one sub. I took the magnet and the motor off of one and j b welded it to the other motor and magnet. I had to wind my own voice coil so it would work. After I was done hooked up to 2 boss 5000w amps. And shattered my back and all my side windows came to this thread to recommend soundqubed and ct sounds. OP goes with soundstream. oh lawd.
cherojeep96 Posted October 23, 2014 Author Report Posted October 23, 2014 I'm at work right now but when I get home I'll look into it more but the 1cu sealed is the net airspace and the pored is around 3.3-3.5 if that changes anything (probably not) how would I get the proper 3:1 this box has to be build right it's holding the sa-12s so a bad box won't be any good
afrakes Posted October 23, 2014 Report Posted October 23, 2014 For a 3:1 ratio u need 2 cubes sealed 6 cubes ported after all displacements. Vehicle: 2014 GMC Sierra 2500HD WT Head Unit: Pioneer DEH- Mids/Highs: Focal Integration ISC 165’s (front) Subs/Amps: TBD
thefourth Posted October 23, 2014 Report Posted October 23, 2014 For a 3:1 ratio u need 2 cubes sealed 6 cubes ported after all displacements. this Thanks alaskanzx5 I might just do thatI can recone a sub myself. About a year ago I took 2 12" power acoustic mofos and made one sub. I took the magnet and the motor off of one and j b welded it to the other motor and magnet. I had to wind my own voice coil so it would work. After I was done hooked up to 2 boss 5000w amps. And shattered my back and all my side windows came to this thread to recommend soundqubed and ct sounds. OP goes with soundstream. oh lawd.
cherojeep96 Posted October 23, 2014 Author Report Posted October 23, 2014 For a 3:1 ratio u need 2 cubes sealed 6 cubes ported after all displacements. Ok thanks I'll look into it and see what I come up with I'm really thankful for the info I'm getting from this forum
cherojeep96 Posted October 24, 2014 Author Report Posted October 24, 2014 ">http:// i went a completely different direction but will make it easier to build the sealed area is 2cu net the ported is 6cu net (give or take a few for the 45s and rounding over
Krakin Posted October 24, 2014 Report Posted October 24, 2014 Don't use REbox calculator, it's wrong. Don't worry about building a fourth based off of ratios. Don't tune a 4th order bandpass to 40 Hz, the tuning doesn't affect low-end extension, it affects the acoustic low-pass filter. Bandpass enclosures require more port area than a regular 4th order/vented enclosure. Learn more before building the box. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener.
cherojeep96 Posted October 24, 2014 Author Report Posted October 24, 2014 Don't use REbox calculator, it's wrong. Don't worry about building a fourth based off of ratios. Don't tune a 4th order bandpass to 40 Hz, the tuning doesn't affect low-end extension, it affects the acoustic low-pass filter. Bandpass enclosures require more port area than a regular 4th order/vented enclosure. Learn more before building the box. Well thats what I'm trying to do got any good hints or tips
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