Hi,
MonAmour build finished!
I decided not to use the power trans cover and showing painted transformer bell instead.
There is some faint hiss that I can hear 2 meter away from the speaker. I suspect its due to TL431 in the cathode. The Stereomour also has the same hiss until I change to simple cathode resistor. Note that my tweeter is very sensitive (Fostex T90A, 106dB/W/m). There is no hiss if I connect the amp to Harbeth P3ES (LS3/5 variant)
The sound : its very clean sounding. Treble is very nice and extended.
Using Sovtek, I thought the mid is slightly harsh at the beginning (relatively, compare to Paramount, not harsh at all in the absolute term). After some break in and switching to JJ 2A3-40 it smooth out and very clean sounding. I think its less forward compare to Stereomour 45.
I can't comment on bass since my speakers have active bass from 200Hz down.