Opinions on the "TACT" sonic signature?

Need to attenuate the bass in a high end system and having trouble finding opinions from anyone who's actually heard a TACT preamp. Surprisingly, neither the tact or rives forums were of help(kind of scary).The one opinion I've gotten was "fastinating sound, but too clinical or choppy for everyday listening. Robert Harley and other writers have used the "once you hear it, it's hard to go back" line, but somehow I don't think they bought one. Anyone heard one? FYI, I don't do much vinyl and would be using it with a transport and possibly an outboard D/A. THANKS!