The Frank stereo amplifier has out performed my Wavelength Cardinal XS mono blocks, VAC PA160, and Wyetech Topaz. Simply stupid good - correction, GREAT.
The Wyetech had the superior leading edge of the note and overall dynamics - until I switched out my Gold Lion 300Bs for the PSVANE Acme 300B which are more lush in the midrange and more extended overall - with dynamics and stage to die for. A 20% improvement at minimum!
Set up with the right speakers, cables, room, and associated gear is essential (as always)
Good luck.
Paul