lukeamdman Posted September 19, 2016 Report Share Posted September 19, 2016 I've been modeling ported enclosures for my IA 21s for a few months and have also received a lot of feedback from Ricci and LTD02. 25hz+, I'm completely satisfied with the system. On the low end of the SPL spectrum, I'm around 130db at 10hz and 136db at 17hz. After 6+ months of testing various levels of boost <10hz, in my room it just doesn't add anything. 10hz is definitely noticeable/enjoyable, so I don't want to lose any SPL there. The current plan is 8 of these. Outside dimensions with double baffle: 36" wide 28.5" tall 30" deep (3) 8.5" x 2.625" ports. Port length is ~55". Net internal volume: 11.72cu.ft 1/2" round over: Tune ended up at 14hz: All 8 + the Othorns stacked behind the mains: Link to comment Share on other sites More sharing options...
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