I'm sure you'll get a lot of posts. I was very impressed with Jim Denton's Fostex 6.5 inch in a voigt pipe. I would recommend that driver in either a voigt pipe, or even a bass reflex, tuned high. FRom 100 HZ to about 5 khz, that would be a great driver. You can cross it with a super tweeter, and do the bottom with a sub, to get really good sound -akhilesh