Audio Research I/50

Interested to hear.

@dweller The manual says "Upon replacing a power tube or tube set, the I/50 must be biased by a trained technician to ensure proper operating values."

@stone1 Where did you read that the I/50 has auto bias? I can’t seem to find it anywhere. May I just missed it. Thanks.

@rsfphil i had linked to a preview above that, at the time, said something along the lines of “like all Audio Research’s recent offerings, the I/50 will have auto bias…”. Curiously, the article has been changed and no longer references that. Can’t find it anywhere else either. Huh. 

you have it here , and also found it on other site at the time.
"The i50 also uses an auto-bias configuration, so you will not have to worry about that aspect of vacuum tube operation either."
but of course its not official and things must to be checked.
https://www.tonepublications.com/review/the-audolici-i50-swing/
and here
 

Ah - maybe it was there (lbtech link) all along and I missed it the second time through somehow. Thanks @stone1