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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 ihcho

ihcho's avatar
ihcho
609 posts
 
Depends.
My PrimaLuna Dialogue premium preamp tubes would last forever (like 10,000 hours), but my Audible Illusions M3B preamp tubes would last much less, about 2,000 (?) hours.  
I prefer the sound of Audible Illusions over PrimaLuna. 
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