ThatGuyWithAJetta Posted July 6, 2012 Report Share Posted July 6, 2012 OK so I decided I would try to design a 4th Order Box for 2 SA-12's and here is what I came up with, Sealed Portion Specs Ported Portion Specs The Box Built in Sketchup, So I would like some critique on weather or not I designed this right and if I didn't design it right what I did right, Thanks, KCowboy620 Quote !999.5 Volkswagen Jetta 1 Planet Audio BIg Bang 15 Powerbass 1500,1 Link to comment Share on other sites More sharing options...
john253a Posted July 7, 2012 Report Share Posted July 7, 2012 get the sealed up to 2-2.2net and ported down to 3-3.5net and higher tune Quote Link to comment Share on other sites More sharing options...
bassface Posted July 7, 2012 Report Share Posted July 7, 2012 My only concern other then the low tune would be the orientation of the subs, im wondering if facing them at the port like that will cause port unloading. Quote Link to comment Share on other sites More sharing options...
Akslowroller Posted July 7, 2012 Report Share Posted July 7, 2012 I think the box ratio is good. I have seen several 4 th order boxes loaded with the subs firing towards the port and they worked well. I am curious what you are going for. Spl? Or a daily driver? If a daily driver I would try and design it with a tunable port. I will give you muck better chance of getting the port how you want it without rebuilding your box. Quote Link to comment Share on other sites More sharing options...
ThatGuyWithAJetta Posted July 7, 2012 Author Report Share Posted July 7, 2012 get the sealed up to 2-2.2net and ported down to 3-3.5net and higher tune My only concern other then the low tune would be the orientation of the subs, im wondering if facing them at the port like that will cause port unloading. I thought I saw somewhere that as long as you couldn't see the subs through the port then it would be okay, but i could try to figure something else out I think the box ratio is good. I have seen several 4 th order boxes loaded with the subs firing towards the port and they worked well. I am curious what you are going for. Spl? Or a daily driver? If a daily driver I would try and design it with a tunable port. I will give you muck better chance of getting the port how you want it without rebuilding your box. Yes it would be for a daily driver and what should I tune it to for best performance in a daily Quote !999.5 Volkswagen Jetta 1 Planet Audio BIg Bang 15 Powerbass 1500,1 Link to comment Share on other sites More sharing options...
Ray Posted July 7, 2012 Report Share Posted July 7, 2012 2.2 sealed 4.2 ported Tune to 41-42 15sqin per Good start Quote 2008 California state record holder 157.2 Bassrace2009 California state record holder 157.0 BassraceRollin 50's 158.7db2009 King of Cali Bassrace2009 USACi score 160.5 @ 42hz Link to comment Share on other sites More sharing options...
ThatGuyWithAJetta Posted July 7, 2012 Author Report Share Posted July 7, 2012 2.2 sealed 4.2 ported Tune to 41-42 15sqin per Good start Alright thanks I'll try to figure something out for the space I have to work with Quote !999.5 Volkswagen Jetta 1 Planet Audio BIg Bang 15 Powerbass 1500,1 Link to comment Share on other sites More sharing options...
john253a Posted July 8, 2012 Report Share Posted July 8, 2012 tune it higher to atleast 47hz Quote Link to comment Share on other sites More sharing options...
ThatGuyWithAJetta Posted July 8, 2012 Author Report Share Posted July 8, 2012 2.2 sealed 4.2 ported Tune to 41-42 15sqin per Good start Alright thanks I'll try to figure something out for the space I have to work with Here is what I got this time it's as close as i could get to those specs without using really weird fractions Sealed side Ported side. Quote !999.5 Volkswagen Jetta 1 Planet Audio BIg Bang 15 Powerbass 1500,1 Link to comment Share on other sites More sharing options...
siucsaluki11 Posted July 8, 2012 Report Share Posted July 8, 2012 How does one determine how big to make the sealed area and how large and where to tune the ported area? Are you guys running formulas, guessing blindly, or are you using software? I have BBP6 and winISD on my other laptop, but its slow, so i usually just stick to my mac. Quote woman..cant live with em...cant shoot em...guess were all fucked You might be a Redneck if you use your leftover gutters for a speaker box port... YOU JUST LOST THE GAMER.I.P. Blazer=========================Last setup was in the 141s on music (37hz) with 2 12s and 1kw in a 4dr blazer.2010 Mitsubishi Lancer DE2 12in Clarions (kept from blazer)HiFonics BRZ1700.1d (at 2 ohms BLOWN) [JBL GTS180X for subs currently 60wRMS x2ch!!!!!! This works for till i get the blown amp fixed] Alpine 4ch salvaged from blazer (currently near death)9887 peerless 7s in the doors and CDT tweeters ran active no speakers in the rearKintik HC1400 under the hood.metered once a while ago, dont remember it...was piss poor compared to the blazer, mid 130s i think....looking to replace subs and amp when i have money. Link to comment Share on other sites More sharing options...
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