ARC Ref 210...tube virgin

My experience is "beware"!  Study and search the forums. 

It may not be for you.

A tube will suddenly fail as some time, and at a minimum a resistor will burn up, or worst case the amp will go up in flames!

This will ether cause great angst, or you will realize this as normal, and be welcome to the world of tube power amps!

I owned an ARC CL-60 tube amp which I traded for a new VT-100. It, apparently, had a bad 6550 power tube (discovered by dealer the next day). I had no idea something was wrong. The point is losing a tube doesn’t always mean a catastrophe.
Good luck with those fine tube amps!
P.S. What is the rest of the system?

@don_c55 - is that normal tube amp activity or model/tube dependent? 

@dweller - Pass XP-20 pre but as yet undecided on speakers.. possibilities are the new PMC twenty5.24, Wilson Benesch Vector, My Audio Design Baron.

There are plenty of choices of amps that don't suffer circuit damage when a tube fails.  Many amps are easy to bias as well.  ARC amps don't meet my expectations.