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What are the best tubes for a VTL TL 2.5 Preamp?

Will changing tubes really make a difference over the stock tubes? Which, by the way are made in China. My VTL uses 2 12AU7's and 2 12AX7"s. Will different tubes and brands make any difference in the sound? Thanks for any input.
mfb33
mfb33 OP
15 posts
 
Thanks for the responses. My VTL does use 12AT7"s and not 12AX7's.
mfb33 OP
15 posts
 
By the way, which has more impact on the sound the 12AU7"s or 12AT7"s?
mrtennis
3,295 posts
 
before investing in expensive tubes, ask the manufacturer if the circuit is tube sensitive.

i have been told by at least 2 manufacturers that the brand of tube will have a very small impact upon the sound of a component.
Post removed 
mrtennis
3,295 posts
 
i suggest that you consider ge 5814 black plate along with the other selections.
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