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Upscale Audio
https://upscaleaudio.com/
Store. Contact Us. Upscale Audio 2058 Wright Avenue La Verne, California 91750 (909) 931-9686. DEMOS & SALES BY APPOINTMENT ONLY Monday-Friday 8:30am - 5:30pm Pacific
Tube Basics and Frequently Asked Questions – Upscale …
https://upscaleaudio.com/pages/tube-basics-and-frequently-asked-questions
Upscale Audio includes matching of all its tubes, in any quantity needed, at no extra charge. You cannot effectively match power tubes on a typical tube tester. Tube testers never applied the amount of voltage necessary to get accurate measurements of power tubes.
Upscale Audio -- Tubes and Reliability - High-End Audio ...
https://forum.audiogon.com/discussions/upscale-audio-tubes-and-reliability
As an fyi, Upscale Audio burns in their tubes for 72 hours before testing and matching. Yes, there have been some glitches here and there, but so far Kevin has always come througth and made good. Although I still buy some tubes from ARC, on rare occassion a few tubes blew shortly after purchase. Yes . . . ARC was 100% reliable in making good.
Grading & Matching – Upscale Audio
https://upscaleaudio.com/pages/grading-matching
Most small signal and preamp tubes you buy at Upscale Audio will have individual test results. First, each tube is heated up and cooled down in a specific manner to see if the tube will shift internally and become microphonic. Next, each tube is tested for shorts and grid leakage. After this test, the tube is listened to with high-quality ...
Upscale Audio Reviews | 12 Reviews of …
https://www.resellerratings.com/store/Upscale_Audio
Upscale Audio claims to test their tubes and to be very selective of the tubes they sell. However, look at the videos of tube reviews done by Kevin Deal. He will look at a tube on the video and say he would never sell such a tube because the triode balances are off.
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