Notoriousj76 Posted April 11, 2012 Report Share Posted April 11, 2012 (edited) I know you can have too little port area, less than 15in2 per 1ft3..... But often times I see ultra large ports in walled builds. I'm currently designing a 4th order for 2 18s and want to be able to get in through the loading wall to mount the subs. Ported side looks like it's gonna be 12ft3 and a port big enough to fit in is at least 300in2. Just wondering if it would do anything other than help control excursion maybe from restricted air movement, if that's even the case. It just sounds logical to me. Edited April 11, 2012 by Notoriousj76 Quote Link to comment Share on other sites More sharing options...
FroznBeavrBALLs Posted April 11, 2012 Report Share Posted April 11, 2012 i dont understand? you want to make your port big inorder to mount the subs easier? Quote 2 DC 12" lvl 4s 1 DC 1.2k XS Power S3400 big 3 Alll KNU wire Pioneer HU cheapo Legacy coaxes (just for now) http://www.stevemead...n-sentra-build/ Link to comment Share on other sites More sharing options...
Sergeant_Skyrim Posted April 11, 2012 Report Share Posted April 11, 2012 I know you can have too little port area, less than 15in2 per 1ft3..... But often times I see ultra large ports in walled builds. I'm currently designing a 4th order for 2 18s and want to be able to get in through the loading wall to mount the subs. Ported side looks like it's gonna be 12ft3 and a port big enough to fit in is at least 300in2. Just wondering if it would do anything other than help control excursion maybe from restricted air movement, if that's even the case. It just sounds logical to me. 300in2 for a 12ft3 ported section is 25in2 per 1ft3 Quote Build in progress Link to comment Share on other sites More sharing options...
john253a Posted April 11, 2012 Report Share Posted April 11, 2012 Just make a section removable in the box If you want do it in perspecs to show them off Quote Link to comment Share on other sites More sharing options...
bkolfo4 Posted April 11, 2012 Report Share Posted April 11, 2012 I know you can have too little port area, less than 15in2 per 1ft3..... But often times I see ultra large ports in walled builds. I'm currently designing a 4th order for 2 18s and want to be able to get in through the loading wall to mount the subs. Ported side looks like it's gonna be 12ft3 and a port big enough to fit in is at least 300in2. Just wondering if it would do anything other than help control excursion maybe from restricted air movement, if that's even the case. It just sounds logical to me. 300in2 for a 12ft3 ported section is 25in2 per 1ft3 300 sqin is not too much port area for a pair of 18's. When will people stop worrying about box size vs. port area????!!!!! 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...
uhoh_45 Posted April 11, 2012 Report Share Posted April 11, 2012 Mhmm port area (wall was ment for 2-18s) Quote R.I.P! (Nov-29-2009) 92 explorer - 4 Atomic Apxx 15s duel .7s - 4rth order bandpass wall -4 powerbass XA-3000D's - 16 8volt batts wired to 16 volts - (9+/9-) runs 0gauge - 152.3 Db @ 29hz BUILD LOG current build 97 chevy lumina4 - 1 Atomic Apx 18 - 6 cube slot port trunk sealed off - 1 powerbass XA-3000D - 2 optima G31s in spare tire18 1 run 1/0 lumina build log Link to comment Share on other sites More sharing options...
Notoriousj76 Posted April 12, 2012 Author Report Share Posted April 12, 2012 So .... I take it as it does not matter? long as it's at least big enough? Quote Link to comment Share on other sites More sharing options...
sprkn_ranger Posted April 12, 2012 Report Share Posted April 12, 2012 When will people stop worrying about box size vs. port area????!!!!! I would really like to hear your thoughts about this if you have a min...pm me if you want Quote Check out my build log! 4 Havocs in a blowthrough http://www.stevemeadedesigns.com/board/topic/187506-sprkn-rangers-blowthrough-build/ Link to comment Share on other sites More sharing options...
SnowDrifter Posted April 12, 2012 Report Share Posted April 12, 2012 Your port area should be large enough to keep the air speed low enough so you don't get turbulence or wind noise. Port area per cube is purely a rule of thumb. Quote ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444 Link to comment Share on other sites More sharing options...
Noobtastic14 Posted April 12, 2012 Report Share Posted April 12, 2012 It also effects the roll off and peak of the enclosure. 15cuft small port may have a +3db @40hz and F3@28hz 15cuft large port may have a +6db @40hz and F3@35hz This is purely hypothetical but you get what I mean. -Drew Quote I am a United States Military Arts and Crafts Professional. Sand it off, Paint it on. uhoh_45 said: dont be a pussy P give the jeep to drew Link to comment Share on other sites More sharing options...
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