Genalex Gold LionKT77, Matched Pair (2 tubes)

Sounds great. Shipped fast. Really good customer service.

Replaced broken-in EL34Bs with these for my Decware "Rachael" 6 watt S.E.T. ultra-high fidelity, self-biasing, tube amp (driving efficient Klipsch Heresy III speakers). Right out of the box, they are better sounding than the EL34Bs that the amp is voiced for by the amp's designer, Steve Deckert, IMO. I also compared on the same music Gold Lion KT88s and Winged-C EL 34s. The KT77s had the same intoxicating vocal presence of the EL34Bs, something I regard very highly, but without the compression and comparatively loose bass of the EL34s. Clearer high frequencies, too. The Winged-Cs were too bright (albeit not broken in) and not as full sounding or musical as the larger-bottled EL34Bs. The KT88s were more balanced in that no frequency was emphasized or more forward, but seemed to need a lot more wattage, such as from a Class AB, push-pull, tube amp. (They're wonderful sounding tubes, but just not for an S.E.T Class A amp, I think). I'd done "rolling." The KT77s are what I'll be using in that remarkably musical, transparent little amp from now on.

I replaced a couple of no name EL-34B tubes with these in my small tube amp and wow! My amp is nowhere close to a McIntosh but these tubes did a number on it. Not only does it have a much wider audio range but there was a noticeable increase in volume output as well. Excellent tumes well worth the money.

Wonderful sounding tube- replacing my current EL34B tubes in my single ended amp. Viva's prices are fair, and all my orders from them have been shipped rapidly and safely packed.

Nothing magical, just a regular tube, I tried it on my Line 6 DT50 212 and there is no difference between this one and stock EHX.