dexjam

Thanks bradprobert. That was the conclusion that I came to also. I think I will do sealed.

I'm interested in the SD2 D4's for a shallow mount build. I would like to know how you would find the vent length for the very small enclosure recommended by the Sundown website. When I calculate vent length, I'm getting really long vents in order to tune to frequencies even as high as 45hz. Even with small port area, I'm still getting vents that are much longer than what is practical. The website suggests using a 0.5 cubic foot enclosure if you are venting, and 0.25 cubic feet for sealed. The website does not; however, specify a tuning frequency or vent size or length. Any help would be greatly appreciated.