Here are a pair of very strong testing Telefunken 12AU7/ECC82 tubes. These are phono grade tubes, with ribbed plates, have 'Artisan' branded on them, plus (of course) have the diamond on the bottom. The sound from these is very linear, with no bloom or coloration in any certain frequency range, just all of everything. They're not what I would call 'analytical' though they are fast and precise. I like them a lot. I had sold several dozens of these a few years ago and everyone that purchased a pair or two were very happy with them.These test almost off the chart at 117/113 and 118/114 on my B&K 707 mutual conductance tester where 120 is the top reading and 66 is the minimum 'good'. Normally, NOS 12AU7s test around 95 to 110. I could sell these as NOS and they probably are, but since I don't know for sure I'm selling them as used. I pack very well. Check out my feedback on A-Gon. Shipping to the continental US is free. If you are outside the US please send an email for mailing costs. I accept checks, money orders, and PayPal for payment. Please email if you have any questions.
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