we_drop_bass Posted April 9, 2012 Report Share Posted April 9, 2012 Alright, I'm building a box for 2 12 L7's (separate chambers) that will be on zx1500.1 @ 2ohms Each chamber will have 3.724 ft^3 gross volume I guess my first questions is, when you discuss port area per cube, are we talking net or gross? I've seen a lot of people say 12-16, seen 10-12 and then of course much larger port areas for more powerful/bigger applications. My port area is kind of limited so basically I have two options which I will list here. Both result in a tuning of 34 Hz before bracing/sub displacement (which I'm gonna ballpark will put me at 35 Hz, maybe 36 Hz once its all said and done). Port 1: internal - (2.5*12.75)* 17 deep results in net volume of 3.26 port area per cube (in^2/ft^3) - 9.75 (net), 8.56 (gross) port 2: internal - (2.5*14)* 19 deep results in net volume 3.19 port area per cube (in^2/ft^3) - 11 (net), 9.4(gross) So I could probably go a little bit wider than the 14, but then have to make it longer and sacrifice more volume, is gaining the port area per cube worth the sacrifice in volume, how does port area affect frequency response ( if at all) or is it mainly a concern with port noise longwinded I know, but thanks... 2008 Denali Singer 270 2 XS D3400s under hood Sundown SCV-6000D SHCA 1/0 Q Logic Kickpanels - lame 5.25 components for now ..... Planning/acquiring everything else Link to comment Share on other sites More sharing options...
bkolfo4 Posted April 9, 2012 Report Share Posted April 9, 2012 Better go with the larger. . . 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...
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