@@NosEL34 I used to think they were just a good tube with a lovely treble, then we used them in one of our headphone amp prototypes as the input gain stage and they just blew me away with a nice warm full midrange and a treble that was the best we've ever heard. Even though everyone knows tubes are partly dependent on the circuit they're running, it's always worth repeating. Another common problem we see all the time is poorly designed circuits that don't even give the tubes a chance to show what they're capable of - this is a common problem even in expensive amps.

@@tubelab194 very true & well said. I guess I should say that I haven't listened to the clear tops in a circuit that brought out their full potential. They are definitely a very popular tube.

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