Genalex - GZ34 / U77

1 Review

Availability: Usually ships within 24 hours.

USD $‎42.95
The Genalex Gold Lion GZ34 / U77 is smooth, refined, and balanced for the very best high-end audio sound. This GZ34 (5AR4) tube is robust and works great in many different guitar amps such as Vox and Fender amps, but also vintage hifi like Dynaco and Scott.

GZ34 and U77 is the European name for the 5AR4 and is compatible with any circuit using a 5AR4 tube.

Other Genalex - Gold Lion tubes5AR4 Tube Types

Warranty Information and Return Policy

Warranty Period: 3 months

All our tubes are guaranteed for 3 months from the date of purchase. (Any exceptions will be noted on that tube's Warranty tab)

If you receive a tube that does not perform to the manufacturer's specifications, please do the following:

- contact us to get a return authorization

- return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.

Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.

We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.

These guidelines may be updated without notice.

Ratings & Reviews

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A Nice Surprise


This tube replaces the stock Sovtek 5AR4 in my ModWright LS100. I'm only just beginning to appreciate the effect rectifiers have on sound quality. With this tube the sound is smoother and more relaxed. The sound stage is moved back somewhat. But the real surprise is that individual instruments seem to stand up when played and then sit down again when the player is done. This effect just adds more dimension and realism to high definition recordings. Can't comment yet on reliability, but the sound quality is a notable step up.