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How long can preamp tubes last?

Good evening Ladies and Gents
Trying to learn! I have had a Shiit Freya + preamp for about 1 year now, and it has about 450 hours of play time, with original tubes.
Is it time to change the tubs? What tubes/brand would be recommended to purchase? 
As far as budget, I really have no idea what they cost.
Also, what does the expression" rolling the tubes" means?

Any information would be welcome.
Thank for reading.
rockanroller

Showing 1 response by rettrussell

rettrussell's avatar
rettrussell
175 posts
 
I find that my CJ PV2ar preamp needs tubes about every 2 to 3 years when played 20 to 50 hours a week (average).
When that "wind" sound through my speakers gets a little loud, amp turned to zero volume,  it's time to order replacement tubes.
When the new tubes get broken-in the noise floor always drops to an acceptable levelandthe dynamics get better.
My bank account sure wishes they would last longer..... 
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