I had a couple of tubes in my VTL 185s get fried from a near lightning strike. the folks from VTL sent me two new tubes, one for each amp, with no concern for matching. Stuffed them in, did a re-bias and they sound great, bias has remained stable for about 3 mo w/ no problems. I think the matched set thing may be overrated.
Tubes: unmatched Quads or Pairs
If you own an amp that has individual bias controls, what is the worse thing that can happen if you install a mismatched tube OR say 1 Svetlana with 3 Sovteks?
thanks
thanks