(26 votes, average: 3.92 out of 5)
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2 thoughts on “MELZ 1578/6N8S Gray plates Metal Base”
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Tube Maze
Guides and reviews of vacuum tubes and tube equipment
These tubes are becoming one of my favorite tubes. Superb sound stage and huge amount of details translate into life like, holographic imaging. Very few tubes are capable of achieving this. As always with military tubes from USSR, the tube doesn’t have issues with treble when it is to brittle. Bass as always, very tight and very strong. It does however take good 60 hours to open up from unused state. These tubes became expensive and harder and harder to get, but still if you want the best, it’s hard to go wrong with these tubes.
Tried these tubes with my 300B amp and loved it. the most realistic sound that I was able to get out of the amp.