I own several ARC pieces, and just recently sold a REF40. The main stuff is all current REF SE series, except for the 160S. Now, the 160S uses fuses to protect the resistors/tubes (I think), and I have blown two fuses over the last year, for reasons unknown. I don’t ever listen above 90 dB, and rarely above 81-82. Service has been great both times, and it’s a cheap, easy swap. And they get credit for having tube health indicators now, without which I never would have known of the [inaudible] problem. Nonetheless, those were annoying episodes. OP, the REF 6SE has been a rock solid, very high performer.