Genalex - Gold Lion KT77 Power Vacuum Tube (Matched)
Need matched power tubes? Don't worry! Price includes matching in any quantity you need for no extra charge. Need a matched pair? Just order "2" tubes. For a matched quad order "4" tubes. Matched sextets and octets are available as well.After extensive research and engineering, New Sensor Corp. has reissued the famed Genalex Gold Lion KT77 vacuum tube. This tube has been recreated down to the finest detail for exceptional performance and sound quality.
For audiophiles, the Genalex/Gold Lion KT77 power tubes have full, yet tight and dynamic lows. They have great clarity in the mid-range as well, and extended highs. Many audiophiles that have previously enjoyed the Winged "C"/SED EL34 tubes have reported that these KT77 tubes are noticeably better.
From our review in guitar amps: "The Gold Lion KT77 is a drop in replacement for an EL34 or 6CA7. The sound however is not typical of an EL34 or 6CA7. It is more of a hybrid. The tube delivers all the mid punch you would expect in an EL34 but also has a top end that is more open and bright. It’s definitely got a bit of a 6L6 designed into it. I tested it in Marshall 2205 50w head and was able to get that 70’s rock sound but with some bias adjustment could also dial in a VOX-like chime."
If you are curious about how these fare in a hifi stereo amplifier be sure to read the Wall of Sound EL34 tube comparison for details.
Other Genalex - Gold Lion tubes
EL34 Tube TypesAdditional Information and Downloads
Reviews:
EL34 Tube Review for Guitar Amplifiers
EL34 Tube Review for HiFi Audio
Tube Matching Information:
Power Tube Matching FAQ
Perfect Pair System
Downloads:
Genalex - Gold Lion KT77 Datasheet (PDF)
Download Adobe Acrobat PDF reader
Warranty Information and Return Policy
Warranty Period: 3 monthsAll 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
21 reviews
NOS replacement
by Mark
These are fantastic tubes, I put them on the same level as the RFT's or old Teslas made at Trinec or any other of the great Eastern European EL34's from the 70's and 80's. In my experience they are exceedingly well made, handle current and voltages well over their published spec, operate quitelty and with predictable reliability. Those are the qualities of the best NOS tubes. As for Sound, these tubes dont add much coloration, maybe thats why they are becoming 1st choice tubes for Audiophiles.In guitar amps that lack of coloration is almost a sort of color itself. They are a great choice if you like 6550 's but dont have an amp that should use 6550's - like a Marshall 3203 Artist or Blackstar 20, for example. These tubes provide headroom and the treble bite and detail of the 6550 and also that cracking-ice overdrive cruch of the 6550's without the high current demand. Not a soft clipping, saturated EL34 , its a ballsy old school metal sound. If you want a saturated, midrange forward EL34 sound , then buy the SED EL34, its the best of that type.