First listen: deep, powerful bass, midrange honky, top rolled off. Stock damping is quite peculiar. I'll return to that topic. My impression is similar to ericj's findings earlier in this thread:
"While the extension is generally good on both ends (or good enough anyway - bass under 40hz and treble rolling off above 12khz, which might just be my own hearing) the only remarkable issue with it is that it has a bit of a midrange hump."
I see potential both regarding sound and construction. It all depends on the driver which apparently is similar to the T30 and T50, but definitely an original design by an unknown manufacturer.