CJ18 Posted February 7, 2013 Report Share Posted February 7, 2013 One thing I noticed when I shrunk my port down to 15per from 18 per was better cone control. I would get a slight knock where I was reaching full Xmax and the coil would knock the pole, and when I shrunk the port down, I regained control of the cone at full tilt and full Xmax Quote Link to comment Share on other sites More sharing options...
Piggi3 Posted February 8, 2013 Author Report Share Posted February 8, 2013 Thank cj. All start at 16 and go from thier. Is my design correct that i put up thier. Quote Link to comment Share on other sites More sharing options...
corona_jeff Posted February 8, 2013 Report Share Posted February 8, 2013 With the sealed side that size, I'd tune the port to around 48-49hz Quote Link to comment Share on other sites More sharing options...
Nikitaaa Posted February 8, 2013 Report Share Posted February 8, 2013 With the sealed side that size, I'd tune the port to around 48-49hz Agreed. Tune it to the resonance of the sealed side. Quote 2007 M/T Honda Civic Coupe EX (4) Sundown Audio X-8's (2) Ampere Audio 3800.1's (3) Stinger SPV-44 Batteries (1) Mechman 240 3:1 Ratio 4th order sealed from the trunkTEAM NWSPLBest termlab scores to date in Honda trunk:151.7db legal (official) IASCA trunk 3 classBest termlab scores to date in my walled Subie:152.9db legal (unofficial) IASCA advanced 2 class155db outlaw Link to comment Share on other sites More sharing options...
Piggi3 Posted February 8, 2013 Author Report Share Posted February 8, 2013 How did you figure out the resonance fqz Quote Link to comment Share on other sites More sharing options...
Piggi3 Posted February 8, 2013 Author Report Share Posted February 8, 2013 How did you figure out the resonance fqz Quote Link to comment Share on other sites More sharing options...
heckvr4 Posted February 9, 2013 Report Share Posted February 9, 2013 Smd im-sg. ^ Quote 05 f150 4 18'' DC lvl6 2 DC AUDIO 9.0ks 161.3 @ 44HZ build log here96 tahoe http://www.stevemeadedesigns.com/board/topic/160522-8-18xls2-dc-100k4th-order/page-9 Link to comment Share on other sites More sharing options...
Piggi3 Posted February 28, 2013 Author Report Share Posted February 28, 2013 How low will it play if i tune to 48hz will it still hit the 30s or no? Quote Link to comment Share on other sites More sharing options...
CJ18 Posted March 1, 2013 Report Share Posted March 1, 2013 Yes it should play down into the high 20s if built right Quote Link to comment Share on other sites More sharing options...
Piggi3 Posted March 1, 2013 Author Report Share Posted March 1, 2013 Ok. I have 4 cubes sealed for a pair so 3.5 with sub displacement and 21cubes ported is that right i did 3:1 Quote Link to comment Share on other sites More sharing options...
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