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Question about matching tubes between phono pre-amp & headphone amp

Posted by peresmeshnik (A) on February 17, 2017 at 19:40:58

Greetings, TA. This is my first post, so apologies in advance if a similar thread already exists (I could not find one via quick search)...

I just broke my piggy bank on a Schiit Mjolnir 2 "tube hybrid" headphone amp. To its single-stage analogue (RCA) inputs I've connected a turntable by way of a Bellari VC-130 single-tube phono preamp (the Mjolnir does not include a separate phono stage). So far they seem to coexist nicely, but I want to replace the stock tubes in the Mjolnir with some different (older) makes. So I'm wondering how important is it --- sonically and/or electrically --- that the single 12AX7 tube in the Bellari match up with the two 6922 tubes in the Mjolnir 2? Or should I not worry about any cumulatively negative effect from using completely different tube brands/years in each of the two preamps? If / when possible, any feedback or suggestions from the TA veterans out there would be appreciated!

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