AVS Special Member
Join Date: Dec 2007
Location: Southern California
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I am sure that they both know that the sound quality drops after 1000 hours, and don't want to admit it to the public.
All I know is that when the sound quality of my preamp is no longer excellent and gets grungy, I didn't pay $6000 for grungy sound. I replace the tubes and get the magic back!
You would have to be pretty damn insensitive to not notice the difference.
A guy I know who worked as a tech for Audio Research for years and then came to California told me that they know damn well that the tubes don't last that long but just don't like to say so for obvious commercial reasons.
They used to claim that their tubes lasted 5000 hours in their user manuals,,but they have quit doing that; now they are just vague on the subject.
When I talk to the guy in charge of testing and selling replacement tubes at Audio Research, he gets very evasive on the subject, and you can tell that HE knows that 5000 hours is bull!