Review on Riverstone Audio Matched Fully Tested Platinum by Karen Anderson

Hello, It's been two and a half years and 10,000 hours of use on my HiFi lamps. It's time to replace all my lamps. The original tubes in my little Suca-Audio T-1 preamp weren't the best when they were new. Recent research has shown that the NOS tubes that came with the Suca preamp were very bad. So I replaced them. with Riverstone audio system - tested/matched pair (2 tubes) 7-pin GE JAN 5654W from Revain. Wow! These new tubes have 9dB lower (cleaner) total harmonic distortion (THD) noise with a flat value across the audio spectrum. What an incredible difference in the sound performance of my amp! I highly recommend these tubes. Perfect. An ideal choice for those small two-tube computer preamps selling in the $40+ range. Riverstone packaged these two little lamps like a jewelry store; and they contained the matched, verified performance of both tubes. Ensuring their consistent and perfect working tubes. I can't say enough about Riverstone's process. Very professional. I'll be returning to Riverstone Audio for my next adventure driving my full Hi-Fi system! :-)