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Fantastic sounding tubes once you work out the kinks. I brought 2 and both were noisy crackling. Fix is to run a hot soldering iron up and down each pin for 30 seconds to reflow the solder. Mine are 1954 version These are a warm tube. Bass slams harder than any 6SN7 I've heard but is also well controlled, doesn't swamp the mids. Midrange is lush and meaty. No recess here. Treble is a touch laid back but also detailed and natural sounding with good amount of air. Decay is excellent. Good imaging, not the widest sounding tube but great depth. Highly recommended tube. Better than RCA 5692 red base.
Verified purchase: No
These 6SN7 equivalents are superb when you get one that works, but the reject rate is pretty high. There is a cure, however, and that is to carefully re-flow the solder inside the pins of the noisy ones. However, they've come up very high in price nowadays, and I don't think they're much better than the JAN Sylvania VT-231s of the same era.
Verified purchase: Yes
Awesome sounding tubes!! Nice midrange and detail. More extending at the high and low frequencies than most 6SN7 tubes. A real sleeper.
Verified purchase: Yes
It turn out to be one bad 1949 tube .
Verified purchase: Yes
The product is exactly as described, sent as described, and i found it good value for money, these tubes are getting hard to find, as most retailers have become semiconductor conscious and no longer stock them. these tubes are used in some complex electronics and to be able to find them is for me a good deal.
Verified purchase: Yes
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