I built a pair using the 8" drivers in their recommended enclosure, and I didn't like them. This driver sounds very much like a Fostex to me, but with too much energy above 1khz. I added Bob Brines' correction filter, which alleviated the problem some but not enough for my taste. Based on my experience I recommend spending a bit more for Fostex Fe series drivers. Bob Brines might have something to add.