First public reviews I saw note highly microphonic nature of these "tubes". This is a big disadvantage for applying them in guitar/bass amplifiers or any other

First public reviews I saw note highly microphonic nature of these "tubes". This is a big disadvantage for applying them in guitar/bass amplifiers or any other live gear. Guitologist has a nice video review that could be interested to tinkerers and musicians: https://www.youtube.com/watch?v=raYGrKWSKRE https://www.youtube.com/watch?v=raYGrKWSKRE