I have this amp for 5 years, its strong point is the serious, with a superb mastery, and a very nice articulation and is ideal in multi-amplification.
weakness, attention to marriage hazardous, under penalty of stiffness;
an iron fist in a velvet glove.
I replace it with blocks Radford tubes.
the ratio Q / P is good at this price, given the rarity and condition of this amp.
if I could keep it for a future multi-channel ....