I had not heard the 300W Technical Brain monoblocks ($90,000/pair) before, but driving the TAD CR1 speakers that I very positively reviewed last January ($40,600/pair with stands), they produced a sound from the Reference Recordings Nojima performance of Liszt's Mephisto Waltz that offered superb scale yet with equally superb microdynamics. The amplifier is said to run in class-A up to 120W and has "no resistors in the signal path"! Source was the Ratoc D/A converter (currently only available in Japan) fed data by a MacBook Air, preamp was also Technical Brain ($57,000) and cables were all TB designer Kurosawa-san's own. The system was powered by the Audience aR12-TS power conditioner.