How far over the limit can I go


I am currently just past the recommended 2000 tube life on my power amp. (Audio Research Ref 110).  It still sounds glorious. Am I playing with fire here?  Or, will I notice some degradation in sound that will prompt the re-tube.  I think it's about $1,000 to retube.  

Thanks guys!!!
jemmer01

Showing 2 responses by petg60

nos power tubes are not a practical option with modern arc tube amps - we are talking modern day kt120 or kt150’s which the amps are tuned for driving, for maximum power and transparency
How true
You can wait till your amp sounds lifeless, but ARC state 2000hrs, idling, with music, it does not matter. Start thinking of re tubing. Better safe than sorry.