Quote Originally Posted by jrsevy View Post
I think I figured 8.4 cubic feet with all bracing accounted for. I calculated the port dimensions at 28Hz. The frequency I found for the LE-15A used by JBL is 30Hz, so I'll maybe play around with it.

As long as we're on the subject of the woofer enclosure, would you recommend adding insulation on all sides? I saw pictures of Metregons that appeared to have insulation on all but the back and the baffle. I plan on using 1.5" thick denim insulation from Home Depot. Don't want fiberglass fibers going airborne through the port from the woofer movement.
Denim is excellent. I would stick with 30Hz tuning especially since you’ll likely gain a little effective volume from the additional insulation. I would put it on five sides. Everywhere but the baffle.


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