Transl,
I have Unison Research Performance amplifier,it is same as Sinfonia beyond one Kt88 plus for each channel.
I am happy with Shuguang KT88/98 power tubes and for the 12au7 I could not find out any better than stock EH12au7s (I do not know it is because of this amps circuity or what reason?) and for the 12ax7s I have the best sound with both Ei and Shuguang 12ax7s.
I also replaced the stock icel brand capacitors (one 0.47 for each channel)with
Vcaps and made this amp much better.
I have Unison Research Performance amplifier,it is same as Sinfonia beyond one Kt88 plus for each channel.
I am happy with Shuguang KT88/98 power tubes and for the 12au7 I could not find out any better than stock EH12au7s (I do not know it is because of this amps circuity or what reason?) and for the 12ax7s I have the best sound with both Ei and Shuguang 12ax7s.
I also replaced the stock icel brand capacitors (one 0.47 for each channel)with
Vcaps and made this amp much better.