Speed is offering you a pretty decent deal on a really good sub. If you buy it, you definitly should port this sub. The Zenclosure box I believe is 1.5 cu ft which will tune to 30Hz with a 3" X 8.30" port. I would make sure its flared at both ends. You can buy them at Parts-Express.com - Speakers, Speaker Building, Home Audio and Video, Pro Audio, Electronic Parts & Accessories PARTS EXPRESS, Speakers, Speaker Parts, Guitar speakers, Bass speakers, Woofers, Drivers, speaker upgrades and replacement speakers. Emine.
This sub will hit really low in that box while still sounding as good as it would sealed but with less upper bass. I am glad to see that ID finally ditched the cheap, old-school stamped steel baskets.
http://www.imagedynamicsusa.com/pdf/...20D2%20v.3.pdf
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