These were the Sovtek 6922's from Russia until we got 2 batches way out of spec for gain and other parameters. Fortunately we have good back stock on the NOS Russian 6DJ8 and are a direct replacement for the 6922. These are the ones that ARC loved before the Russian 6922 came on the scene.
Our Low Noise tubes are a superior tube especially tested for today’s quality line stages. Only 30% of the tubes we test perform well enough to be considered Low Noise.
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