Ballen194 Posted January 27, 2012 Report Share Posted January 27, 2012 Title pretty much says all. I'm gonna be putting 2 15's in a box running them off mono amp. Box will look like what is the default image on the RE audio box part of the website. Question is when doing so, obviously the cubic feet will get doubled for 2 subs. But how does having 2 subs effect the port? What do I change with the specs in order to tune it for 2 subs? Quote 98 Isuzu Rodeo Pioneer Deh-6300ub SUBS*Upcoming* SSA Xcon 18 4th order AMP Banda 3500 Mids/Highs Pioneer EQ Clarion EQS746 ETC. Two 1/0 run's KnuKoncepts 1/0 big 3 Shuriken BT-100 under the hood Shuriken BT-120 in the back Link to comment Share on other sites More sharing options...
bkolfo4 Posted January 27, 2012 Report Share Posted January 27, 2012 Double the area and then calculate the required length. 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...
Ballen194 Posted January 27, 2012 Author Report Share Posted January 27, 2012 Double the area and then calculate the required length. so basically if i was tuning it to lets say 30hz with the re audio box calc, wouldnt all i have to do is just adjust the port to 60 hz? or is my logic backwards? Quote 98 Isuzu Rodeo Pioneer Deh-6300ub SUBS*Upcoming* SSA Xcon 18 4th order AMP Banda 3500 Mids/Highs Pioneer EQ Clarion EQS746 ETC. Two 1/0 run's KnuKoncepts 1/0 big 3 Shuriken BT-100 under the hood Shuriken BT-120 in the back Link to comment Share on other sites More sharing options...
alaskanzx5 Posted January 27, 2012 Report Share Posted January 27, 2012 umm, you want the port to be more of in the 30-38hz range with 14-16 sq inches of port per sq foot of box for a slot port and i think it was 9-13 for aero ports Quote t1500bdcp 2 t2d4 15" 1 t600.4 1 t400.2 1 set p1 tweets singer alt, tons of wiring, smd vm-1, 80prs, back seat delete, still in the works, aiming for a 145-147 with the ability to play 25hz up to 50hz. Link to comment Share on other sites More sharing options...
Ballen194 Posted January 27, 2012 Author Report Share Posted January 27, 2012 umm, you want the port to be more of in the 30-38hz range with 14-16 sq inches of port per sq foot of box for a slot port and i think it was 9-13 for aero ports yea i know but it just seems like common sense if you were to double port area, in turn, youd double hz. but i think im wrong. Quote 98 Isuzu Rodeo Pioneer Deh-6300ub SUBS*Upcoming* SSA Xcon 18 4th order AMP Banda 3500 Mids/Highs Pioneer EQ Clarion EQS746 ETC. Two 1/0 run's KnuKoncepts 1/0 big 3 Shuriken BT-100 under the hood Shuriken BT-120 in the back Link to comment Share on other sites More sharing options...
Joe X Posted January 27, 2012 Report Share Posted January 27, 2012 If you are doubling the airspace you need to put a second port that is *identical* to the one previously used, if you want a single port you have double the area and recalculate the port length to the tuning of the previous one. Also the last time I checked the RE calculator had obvious flaws, work with the Torres claculator wich is free and is more accurate. Quote Link to comment Share on other sites More sharing options...
Ballen194 Posted January 27, 2012 Author Report Share Posted January 27, 2012 Thanks for the help guys. Quote 98 Isuzu Rodeo Pioneer Deh-6300ub SUBS*Upcoming* SSA Xcon 18 4th order AMP Banda 3500 Mids/Highs Pioneer EQ Clarion EQS746 ETC. Two 1/0 run's KnuKoncepts 1/0 big 3 Shuriken BT-100 under the hood Shuriken BT-120 in the back Link to comment Share on other sites More sharing options...
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