Provided Link: Woofer in Question


I wanted to build a modest-size PA speaker, and chose the pym1278 (292-232) 12" driver since it's listed as a PA speaker, is relatively inexpensive, features a VAS of only 2.11, and is pretty efficient.
I paired it with a Selenium D210i (263-236) plus a basic Goldwood GM-600PB Horn, and plan to bi-amp it.
Now, the fs. on that woofer is a relatively high 63 Hz., I know, but I really don't seem to be getting any bass out of it, despite building the suggested enclosure (3/4" particle, braced in 2 dimensions, two ducts, also fiberglass on 3 walls). Have any of you pundits had any experience with this particular loudspeaker, maybe have some suggestions? I'm not terribly impressed with the tweeter, either, to tell the truth.
Thanks!