I think it would prolly work fine. My main reason for going with the Half-Wedge was I had already try the other types of enclosures. First was sealed , next ported, and iso-loaded ported. The HWK18 was too big and even fouth-order BP was going to be large for the sub I was using. I took a 8ft^3 ported enclosure and chop it in half and made me a couple of wedges. The wedges outperform all the others I had tried. Lower frequency response, better spl, and the enclosure was not so huge.

I think the Half-Wedge will be exactly what you want but that is my $0.02.



HT-EXT

An after thought: the depth measurement on my sub will be 26" and the plans state that there needs to be 1" from the floor at the beginning of the slope were the driver is mounted and the plan states and opening size for the exit--is there a relationship for a "correct slope vs output opening size"?  

The reason I ask is that if I were to port this driver it requires an 8" port according to Kevin at Exodus Audio to avoid port noise down deep.  In other words is there a magic formula that needs to be adhered to regarding the start height of the slope from the floor, the width of the slope and the exit height of the opening?