|
You are buying 2 tubes, mint inventory from a case/100, Philips 5814A, which is premium grade industrial version of 12AU7A, blue-label, matching date codes, factory uniform from the same case! BEST of best USA, vintage 1987 manufacture. We have multiple pairs available, so see inventory for current quantities that are available. Highly regarded by audiophiles. These tubes are my personal favorite choice: I run this same inventory in my own amps. Each tube has been tested on our calibrated US Military TV-7A/U professional mutual conductance tube tester, and also without shorts or leakage (see photo for example; obviously each tube will test ~slightly~ different). |