lotus Posted January 13, 2012 Author Report Share Posted January 13, 2012 what about 35hz with 4.5cu net, 4.5" port thats 21" long Quote 2010 Cobalt LT Coupe Subs: 2 American bass XFL 12s Amp: Crescendo BC3500D Big 3 in 1/0awg 29hz box stinger volt meter 2nd battery Deka 9a31 pioneer DEH-9400BH Link to comment Share on other sites More sharing options...
Autruche Posted January 13, 2012 Report Share Posted January 13, 2012 Two 4in aero ports 8 inches long tunes you to 32.4 Partsexpress.com sells them ultra cheap. hella easy to install #Problem solved Ohhh and i did this on torres calc 2 4" aeros is only enough port for 1 12. Quote Need Test Tones/Sine Waves? Click Here!My Saab 9000 build1993 Saab 9000 Aero 5spdPioneer - Zapco - Hifonics - Sundown Audio - O2 Audio - RE AudioJust Say No To Rear SpeakersJust Say No To CCA WireReal Men Drive StickHit me up on Facebook, if you want Link to comment Share on other sites More sharing options...
Joe X Posted January 14, 2012 Report Share Posted January 14, 2012 what about 35hz with 4.5cu net, 4.5" port thats 21" long If you have fixed external dims you can't decide Vb, for a 35Hz tuning this could work: Enclosure Specifications: Fb = 35,01 Hz Vb = 4,34 ft^3 Subwoofer Mounting = Front Mounted External Height = 15 in External Width = 33 in External Depth = 25 in Port Width = 5 1/4 in Cut List: * All Dimensions in Inches. * Wood Thickness is 3/4 for all Parts. External Enclosure Parts: Front & Back = 33 x 15 Left & Right Sides = 23 1/2 x 13 1/2 Top & Bottom = 33 x 23 1/2 L Port Internal Assembly Parts: Front to Back = 18 1/4 x 13 1/2 Extension = 1 5/16 x 13 1/2 Quote Link to comment Share on other sites More sharing options...
bkolfo4 Posted January 14, 2012 Report Share Posted January 14, 2012 2 4" aeros is only enough port for 1 12. I don't see what type of 12" subs they are, but 2 4" areos will work with a pair of 12's. Ever see the great 12" challenge a few years ago? They were doing crazy numbers with a 12" BTL on a few thousand watts and a single 4" aero. PSI ran a pair of MT 15" with 4 4" aeros and did mid 150's playing music. . . Quote Current system: 1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s Previous systems: 2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz. 1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz. Link to comment Share on other sites More sharing options...
CleanSierra Posted January 14, 2012 Report Share Posted January 14, 2012 I love that the TITLE of this post is L-Shaped tuning and dudes are suggesting Aeros. So let's suggest directions that he WANTS to head, not somewhere he doesn't want to go. I believe we got him lined out with box dimensions and port size. Quote Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
Mad_Mike Posted January 14, 2012 Report Share Posted January 14, 2012 Just use the box calculators all over the net. RE has a nice one for L shaped slot ports. Your driver manufacturer should give the total displacement of the woofer. And for bracing you just get the volume of the brace and add it in there. Your box should be able to give enough room for however many cu. ft you want to do + driver and bracing displacement. Quote Link to comment Share on other sites More sharing options...
bkolfo4 Posted January 14, 2012 Report Share Posted January 14, 2012 The one from RE is crap. I have corrected at least 10 L-shaped ports for people who have used it. . . Quote Current system: 1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s Previous systems: 2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz. 1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz. Link to comment Share on other sites More sharing options...
CleanSierra Posted January 14, 2012 Report Share Posted January 14, 2012 The one from RE is crap. I have corrected at least 10 L-shaped ports for people who have used it. . . Yeah it doesn't take displacements into consideration and always acts like its 3-5 Hz lower than it actually is. It gives a good idea on visual though. Quote Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
lotus Posted January 16, 2012 Author Report Share Posted January 16, 2012 ok i measured my trunk and everything and found out that 33 will not fit nicely. so i went down to 32.5" width x 15"high x 25"deep and got 21" of port length for about 35.36hz with 13.7in of port area per foot. 4.41 net volume Quote 2010 Cobalt LT Coupe Subs: 2 American bass XFL 12s Amp: Crescendo BC3500D Big 3 in 1/0awg 29hz box stinger volt meter 2nd battery Deka 9a31 pioneer DEH-9400BH Link to comment Share on other sites More sharing options...
CleanSierra Posted January 16, 2012 Report Share Posted January 16, 2012 ok i measured my trunk and everything and found out that 33 will not fit nicely. so i went down to 32.5" width x 15"high x 25"deep and got 21" of port length for about 35.36hz with 13.7in of port area per foot. 4.41 net volume Sounds good, that should definitely work. Quote Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.