tom,
28Bs are one heck of a pair of monoblocs! 1000 watts into 8 ohms, and 1800 watts into 4 ohms. Inordinately low distortion .
I've noticed a change (for the better) in the power amplifiers, from 4B to 4BSST to 4BSST2 to 4B cubed. My 4B cubed has a clarity, smoothness and bass control clearly beyond the SST2. Most noticeable in alto and soprano voices. IMO, their 17 cubed preamp is a step up from the 26.
eagle