Good news! Conrad Johnson just call me and ask the sent my LP-140M for them to update the circuitry for the driver input... so I be able to run any kind of 6922 tubes in my PowerAmp.
They claim that their design was optimized for the used of Electro-Harmonix! ... sound silly to me.
They claim that their design was optimized for the used of Electro-Harmonix! ... sound silly to me.