I have about 15 pairs american NOS 6sn7 . Alot of them were microphonic and the tubes that weren't microphonic still gave me tinnitis, - listener fatigue, headache
I tried Electroharminix new tubes and all is good now. Same extension
I'm using an Aikido Octal preamp
I tried Electroharminix new tubes and all is good now. Same extension
I'm using an Aikido Octal preamp