"But voodoo is exactly the problem, say tube skeptics like Glenn Fricker, an engineer of 25 years who specializes in metal bands at Spectre Sound Studio in Ontario, Canada. He sometimes uses a 1966 amp with its original tubes, but he doubts expensive replacement tubes would improve the sound.
“As a kid we are led to believe there is some dark art in tubes which will inherently change the sound of your amp,” Fricker says. But when he
devised an experiment using sound canceling to reveal the audible differences between tubes, all he uncovered was “a little clicking sound”—they were otherwise identical. He advises guitar slingers to skip the $1,300 vintage Telefunken “Diamond Bottom” 12AX7 online at Tube Depot for the $20 JJ brand from Slovakia. While Fricker is rooting for Western Electric, he says, “Are they going to sound any better than your dear, cheap JJs? No.”
Lmao, this fucking guy.