I used to own this great amp, with extended bias option, all these tubes can be tried and more. The Svetlana 6L6 was a very nice tube with this amp. The TA-30 is a tube roller's dream come true.
Paul at TAD once sent me a list with all the tube possibilities and biasing values.
As for using only 2 tubes for 4 watts, I gained in transparency, but only for low volume listening, with 87db speakers, it just ran out of steam trying to crank it up, but what sweet sounds it made...
Enjoy, it's a great amp....I upgraded to the Cayin A 88-T just as much a bargain as the TA-30 is !
Paul at TAD once sent me a list with all the tube possibilities and biasing values.
As for using only 2 tubes for 4 watts, I gained in transparency, but only for low volume listening, with 87db speakers, it just ran out of steam trying to crank it up, but what sweet sounds it made...
Enjoy, it's a great amp....I upgraded to the Cayin A 88-T just as much a bargain as the TA-30 is !