Audio Research I/50 Integrated Amp

To anyone used to biasing their tube amps or auto bias (together encompassing virtually all semi modern tube amps), having to take it to someone else for biasing can almost be considered a design flaw.  What was ARC thinking back then?

I realize ARC uses carefully selected tubes designed to last, but just the same, stuff happens.

Bet you will never see this in an ARC product again.

On the other hand, if you have a good audio store or servicer nearby that you can count on it could be a great deal to pick one up.

I really enjoy my I/50, but I just replaced the left channel 6922EH driver tube. It was probably original, and I bought the amp used (it was used as a demo unit by a reviewer who must have played it). No biasing needed, only the power (6550) tubes need biasing. It is a shame the amp has to be sent somewhere and can’t be modded for user servicability or auto-biasing. I have also a Willsenton R8, KT-88 push-pull integrated, with similar specs, and that unit is set up for user biasing which is not difficult.  I have to wonder whether they will continue the I/50 with a similar integrated offering what are considered improvements to the I/50. 

What is a lot, and where are they all?

I found 1 on USAM.

Many have been sold if you look under that tab. I saw a few on the Music Room website as well.