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Nagra VPA 845 retubing

Hi. I have a pair of Nagra VPA monoblocks with 845 tubes. I bought these used. When I contacted a local dealer I was told that I should only buy tubes from Nagra, because Nagra supposedly ensures that they are perfectly matched and are fully compatible with the amps (they costs 900 a pair!). Is this true, or is this a racket? Has anyone tried other matched 845 tubes than those sold by Nagra? If so, any preferences? Thanks
obrennan1963

Showing 1 response by jfrech

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jfrech
1,816 posts
 
Hi I don't have Nagra VPA's, but I do have a Nagra PLL and VPS. They do heavily test their tubes and warranty them. Not all 845's also are perfectly to the same specs and could possibly cause a issue. Those are GREAT amps, I've heard them lot's at my dealers...I spend the $$'s....it's not a racket.

I agree it's a little pricey...but you also don't have to worry a about a bad tube and matching is important in balanced amps...like you VPA's

Out of curiosity, what preamp are you using with them?
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