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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
rajivhifi's avatar
rajivhifi
57 posts
 
There was a youtube video made by Paul of PS Audio last week where he recommends changing the tubes every 6 months if not a year. The advise I have heard here suggests they usually last a very long time. Kind of different schools of thought, though I honestly don't know which is correct. May have to be your own judge. 
https://youtu.be/HdNqD_dVBR4
oldhvymec
5,101 posts
 
ok ok 1/2 a million years.. They found some with dinosaurs fossils.
Don't you guys watch the Flintstones. They used ROCK tubes..
peguinpower
59 posts
 
BAT - 2000 hours then new tubes will sound amazing comparably.

Allnic - 10,000 hours

Jolida - 5000 hours

just a small sample based on personal experience
jwillox
177 posts
 
@oldhvymec. Yeah I like the Rock Tubes, even if they do sound a little hard 😎
middlemass
902 posts
 
You guys never saw the episode where Fred showed off his Rockport turntable?
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