~50 lb tapped horn, woofer under $100, high efficiency, low power?

[turbodawg]

I'm still trying to make a decision on this. My latest scheme is a Dayton 15" Ref HO in about 85liters (including 2x 5" diameter ports), tuned high to hit over 95 db/w/m/2pi 40-50hz, and can have one port pluged to play flat to below 30hz. Ack.

 

[maxo]

turbo,
so what happened
what you decided to build

 

[turbodawg]

http://www.diyaudio.com/forums/subwoofers/219923-ultra-compact-ported-15-dayton-ref-ho.html

 

[maxo]

how is it working , spill the beans !
it was at 100 bucks or less total cost ?
and also... what was the reason you drop the TH design for a Ported one