I replaced my gec in my tva-1 this was the 3rd tube I tried. The sound was very comparable to the gec. Far superior to the other tubes.
Following the purchase of these Tubes TAD KT88 STR, and after thirty hours I am filled by listening to these tubes.
My PP-UL Amplifier is homemade, and after listening to EH KT88 EH KT90 and JJ KT88.
I have to admit that these TAD Tubes are really hard-hitting in a HIFI listening.
Thanks to TubeAmpDoctor for making me discover these KT88, and thanks to Stefan for these technical advices.