Both sounded equally good, but IĬhose Pearl because to my ears, they had less tube to tube variability and they provide detailed information on test processes, detailed test results, and with clearly indicated the tube’s gradeīased on the quantified noise level differences. and Peal Cryo Valves does supply very good vintage cryoed tubes, though at a cost. ![]() When I decided to buy more they were already sold out. The tubes from were excellent with very reasonable price. Switch back to non-cryoed tubes after usingĬryoed tubes for a while, my impression of the sound was dull, slow and were not as engaging.Īs to the cryoed NOS Tunsol 5687s, I tried the ones from, , and Peal Cryo Valves. For instance, I have tried non cryoed Tungsol 5687 and RCA 6X5 from the similar vintage. They also gave a better sense of pace and rhythm with To my ears, cryogenically treated (cryoed) tubes sounds more extended and open that throws larger sound stage without being bright or thin.
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