Which preamps use 6922/6DJ8 tubes?

ralph makes a fair point about the 6dj8 tube and it being somewhat prone to microphony (just ask past owners of the audible illusions preamps)... of course that aspect can be managed (with a cost of course) by effective design and choice of particular tube, if the linestage otherwise does what pleases its owner

Roger Modjeski of Music Reference liked the 6DJ8/6922 very much, as did EAR-Yoshino's Tim de Paravicini, who uses the 7DJ8 (a higher voltage variant of the 6DJ8) in his pre-amps. I hear no evidence of microphony in my EAR 868 (isolated by Townshend Audio Seismic Pods).

Of all the preamps I’ve had, the ones with 6DJ8 have actually not been prone to microphonics issues. But I’ve had a 6SN7 preamp and another 6H30 pre that were extremely sensitive to it. The biggest trigger I’ve noticed is having too much gain. Once you get over 15dB gain, whatever the tube, you’re asking for trouble here.

Exactly @mulveling, excessive gain is to be avoided. Does Art Ferris still make his Audible Illusions Modulus pre-amp (which uses the 6DJ8 tube) with 30dB of gain (!) in the line stage?

Exactly @mulveling, excessive gain is to be avoided. Does Art Ferris still make his Audible Illusions Modulus pre-amp (which uses the 6DJ8 tube) with 30dB of gain (!) in the line stage?

@bdp24  30dB gain is "holy cow" territory lol. No wonder folks would complain about 6DJ8 being a microphonic tube if they had that unit!

It seems like there was a time (in the 90s?) when it was common to see full function preamps with an MM phono stage and a whopping 20+dB line gain. I’ve seen units from ARC and CJ spec’d like that. I guess the idea was you "could" run a Medium or even Low-output MC cartridge by filling in with line stage gain? Doesn’t work well, IME. Besides having way too much gain AFTER the attenuator (which causes noise issues for sensitive amps & speakers), I’ve not had good results feeding too small a signal into an RIAA stage and then trying to add the extra gain afterwards - dull, flat, lifeless sound.