yea peejayy, not alot of people have heard bout aperiodic membrane enclosures, my guess is only those in the industry and a hand full of tech curious bass-heads have heard of them. I've only ever built 2 ap boxes in my time, both sounded fantastic, both in sedans tho. They were used in comp cars, both cars cleaned up, sound quality only tho. There is no way you will pull competitive dB out of ap boxes.

Glad to have suprised you with somethin new, but yea, you probably wont see them too often.