jmilch Posted July 26, 2011 Report Share Posted July 26, 2011 (edited) **HOLY DOUBLE TOPIC BATMAN. THIS CAN BE ERASED PLEASE MOD** I have a box that has the following dimensions: 17 height, 23 width, 16 depth. After displacement its 2.61 cu ft. I am trying to tune the port to 32 hz. I cant seem to figure it out using torres or the 12v online slot port calc. I come up with 4" x 3" x 10" Doesnt seem to be right.... Can someone chime in? Edited July 29, 2011 by jmilch Quote Pioneer AVH-P4300DVD | Hertz 6.5 | Alpine Type R 6x9 | Custom 200A Alt | Knu Flek 1/0 Big 3 and all wiring | Eclipse EA3422 | AudioQue 2200d | DC XL 12 | Red Oak Box ~2.8 cubes @ 30 hz | Link to comment Share on other sites More sharing options...
mraz Posted July 26, 2011 Report Share Posted July 26, 2011 (edited) need more info... (ie. type of subwoofer, number of subwoofers used, power to each subwoofer, max dimensions) Edited July 26, 2011 by mraz Quote Link to comment Share on other sites More sharing options...
6berry Posted July 26, 2011 Report Share Posted July 26, 2011 first off that port is way too small. try to get around 12-16 square inches of port area per cubic foot of box then find the port length from there. Quote 1999 Audi A4 1.8T::: 4 - DC Level 3 10's in a 4th order Rockford P6002 on Subs for now (3-3.5k coming eventually) MB Quart ONX4.60 for Mids and Highs Boston S50 Components in Front Boston S65 Coaxials in Rear 40 Sq Ft of Second Skin Damplifier Build Thread UBL 1948 Plymouth Link to comment Share on other sites More sharing options...
Supercharged DCs Posted July 26, 2011 Report Share Posted July 26, 2011 I have a box that has the following dimensions: 17 height, 23 width, 16 depth. After displacement its 2.61 cu ft. I am trying to tune the port to 32 hz. I cant seem to figure it out using torres or the 12v online slot port calc. I come up with 4" x 3" x 10" Doesnt seem to be right.... Can someone chime in? I don't have access to a computer at the moment, but I'll try and help. That comes out to 12sqin of port, or roughly 5sqin per cube of port area. That is the reason the port only needs 10" to achieve a 32hz tuning. You need more port area, roughly 12-16sqin per cube. With only 5sqin per, you are bound to have port noise. Quote Bassless once again. Can't seem to keep a system for more than a few weeks Saving for a '06 Nissan 350z, look for build around June 2012. Link to comment Share on other sites More sharing options...
jmilch Posted July 26, 2011 Author Report Share Posted July 26, 2011 (edited) first off that port is way too small. try to get around 12-16 square inches of port area per cubic foot of box then find the port length from there. I know thats why I am asking lol. So how do I increase the port area? so my box should have approx 30 inches of port area. Its a JBL GTi MKii 12" Its getting a solid 1200 watts RMS, but that is irrelevant right now... fs is 31.85 if that matters... **edit** I am figuring this out slowly I think... 10" x 3" is 30 square inches, then just calculate the depth after that? But if I do that... then my port length has to much longer than I have space to do... So whats the trick? Edited July 26, 2011 by jmilch Quote Pioneer AVH-P4300DVD | Hertz 6.5 | Alpine Type R 6x9 | Custom 200A Alt | Knu Flek 1/0 Big 3 and all wiring | Eclipse EA3422 | AudioQue 2200d | DC XL 12 | Red Oak Box ~2.8 cubes @ 30 hz | Link to comment Share on other sites More sharing options...
Supercharged DCs Posted July 26, 2011 Report Share Posted July 26, 2011 (edited) You increase the port area by increasing the port area, lol. As Kidwell said below me, you can bend the port into a "L" shape. Edited July 26, 2011 by Supercharged DCs Quote Bassless once again. Can't seem to keep a system for more than a few weeks Saving for a '06 Nissan 350z, look for build around June 2012. Link to comment Share on other sites More sharing options...
iKidwell Posted July 26, 2011 Report Share Posted July 26, 2011 bend the port? That's pretty simple... Quote c'mon now, if i was shooting an 8 year old, it wouldnt be MY 8 year old. i recently got a Pyle PL1590BL and i was building an enclosure for it tuned to 25 hz. i didn't have any tools to cut a circle so i hit it with a big hammer. 2003 Infiniti G35 Sport Sedan Build in Progress Link to comment Share on other sites More sharing options...
6berry Posted July 26, 2011 Report Share Posted July 26, 2011 put your box dimensions into torres calculator then for example enter 10 for height and 3 for width and then enter different lengths until you reach your desired tuning. Quote 1999 Audi A4 1.8T::: 4 - DC Level 3 10's in a 4th order Rockford P6002 on Subs for now (3-3.5k coming eventually) MB Quart ONX4.60 for Mids and Highs Boston S50 Components in Front Boston S65 Coaxials in Rear 40 Sq Ft of Second Skin Damplifier Build Thread UBL 1948 Plymouth Link to comment Share on other sites More sharing options...
DRauck Posted July 26, 2011 Report Share Posted July 26, 2011 first off that port is way too small. try to get around 12-16 square inches of port area per cubic foot of box then find the port length from there. I know thats why I am asking lol. So how do I increase the port area? so my box should have approx 30 inches of port area. Its a JBL GTi MKii 12" Its getting a solid 1200 watts RMS, but that is irrelevant right now... fs is 31.85 if that matters... **edit** I am figuring this out slowly I think... 10" x 3" is 30 square inches, then just calculate the depth after that? But if I do that... then my port length has to much longer than I have space to do... So whats the trick? Your port can make an L turn as long as the port wall stays the same distance away from the back of the box. (that may have sounded confusing but its almost common sense, so it shouldn't matter lol ) Quote 2011 Honda CR-Z Mugen 12" Kicker SoloX Subwoofer Rockford Fosgate t20001bd Pioneer AVIC-X930BT Head Unit Build Log Link to comment Share on other sites More sharing options...
jmilch Posted July 26, 2011 Author Report Share Posted July 26, 2011 I have a box that has the following dimensions: 17 height, 23 width, 16 depth. After displacement its 2.61 cu ft. I am trying to tune the port to 32 hz. I cant seem to figure it out using torres or the 12v online slot port calc. I come up with 4" x 3" x 10" Doesnt seem to be right.... Can someone chime in? I don't have access to a computer at the moment, but I'll try and help. That comes out to 12sqin of port, or roughly 5sqin per cube of port area. That is the reason the port only needs 10" to achieve a 32hz tuning. You need more port area, roughly 12-16sqin per cube. With only 5sqin per, you are bound to have port noise. Right. So I did 40" square, 10x4, and I couldnt even get it near 32 hz. I tried 13.5 x 3" and couldnt get it close either.. So hmm I need some help Quote Pioneer AVH-P4300DVD | Hertz 6.5 | Alpine Type R 6x9 | Custom 200A Alt | Knu Flek 1/0 Big 3 and all wiring | Eclipse EA3422 | AudioQue 2200d | DC XL 12 | Red Oak Box ~2.8 cubes @ 30 hz | Link to comment Share on other sites More sharing options...
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