No, I'm not saying that at all, in fact that's their forte. But not all single drivers are the same for sure. It was interesting for me to try the FX200 in both the factory BR and a TQWT of my own design (with help from Martin King's software). The BR was less dynamic for sure but seemed to take the edge off rock and other 'produced' recordings, and the ~4kHz peak inherent in the driver's response was much less noticeable in casual listening. The TQWT was designed to have enough gain in the upper bass to not need BSC. Overall, the measurements were quite similar, but of course the BR did not go as low. BTW, the factory BR design is a bit high tuned and warm sounding, which seems to be intentional - to negate the need for electrical BSC.

Anyway, the TQWT was certainly the clear winner in terms of high fidelity and was remarkably lifelike. OTOH, the BR was much more forgiving, but sounded like a stereo rather than the real thing. So, here we have a situation with the same driver, where one enclosure might be more suitable for classical and other dynamic recordings, and the other better for rock, etc.

BTW, since I'm moving in a couple weeks and will no longer be in a converted warehouse, no more huge format HE system for me. I think I'm going to try my FE108E sigmas in backhorns... They're really my fave fostex so far, and I've tried quite a few. Maybe I can make my big TL sub a couch??

Rgds,
Greg B