I definitely prefer GL KT-77's to any EL-34 tube I've heard a warmer richer and still very transparent sound, even compared to some fairly expensive PSvane Philips reproduction EL-34's I picked up which were nice but a bit bright and forward in comparison. Only negative with the GL KT-77s is reliability can be spotty, I've had some tubes go south way to quickly, but even so they are hard to beat for the price.
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