Ensure the seller offers "matched pairs" or "matched quads" for power tubes. This ensures your amp runs efficiently and sounds balanced.
A legendary name in the NOS world. His site looks like it’s from 1995, but his knowledge and inventory of vintage glass are world-class. where to buy amp tubes
Primarily high-end Hi-Fi, but their testing equipment is some of the most advanced in the world. If you want a tube that is guaranteed to be quiet and microphonic-free, this is the place. 4. Direct from the "Re-branders" Ensure the seller offers "matched pairs" or "matched