KT77 tubes vs EL34 tubes .... what do you like better?

Discussion in 'Amps and Cabs' started by Dr. Tweedbucket, Nov 2, 2007.

  1. Dr. Tweedbucket

    Dr. Tweedbucket Supporting Member

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    While =C=, JJ EL34L and New Sensor Mullards sound good, I am kind of warming up to the JJ KT77 tone ! :)
     
  2. stump

    stump Member

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    Of the three I prefer the KT77. There's not a current production EL34, including the JJ's, that I'd take over them. Old stuff is another story.
     
  3. big mike

    big mike Marshall Voiced Moderator Staff Member

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    In my amp, I'm certainly digging the KT77's.
     
  4. Swampash

    Swampash Member

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    The JJ Kt77's, without a doubt....as Dan boul with 65 Amps says, "they're what EL34's want to be when they grow up". :p :rotflmao

    I'd love to try a set of the NOS Red Lions, as I've read that they are even better, but at $450+ per matched pair, that's not likely to happen soon. :(
     
  5. stump

    stump Member

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    I also find them to be a little picky about their bias. I'm fortunate enough to have a quad of the original Gold Lions, but don't use them regularly in my amp as they're worth more than the rig itself. Four Mullard 12AX7s and four GEC's would be at least $2000 to replace if you can find them. And good luck on being matched. Tone of the God's though.
     
  6. bigjim

    bigjim Member

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    Can I drop these in my Carr Hammerhead without biasing?
     
  7. big mike

    big mike Marshall Voiced Moderator Staff Member

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    Bias?

    Cathode Bias amps RULE. LOL

    Although I'm going to try some in my fixed bais amps here shortly.
     
  8. bigjim

    bigjim Member

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    O'Doyle Rules! :rolleyes:
     
  9. big mike

    big mike Marshall Voiced Moderator Staff Member

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    Love that movie.
     
  10. shibby

    shibby Member

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    I'm using =C= el34s now. can you descibe to me what kt77s sound like compared to this tube?
     
  11. big mike

    big mike Marshall Voiced Moderator Staff Member

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    To my ear, more highs and lows, overall a moe balanced tone, and not as mid heavy as the winged C's can be.
     
  12. Plexed

    Plexed Member

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    I switched up a pair of JJ EL34's for JJ KT77's in my Marshall DSL 50.
    As far as I can hear - Bigger bottom end, more shimmer on the high end,
    greater note separation, more complex tone, less mids, more of a rounder
    sound, although can still can very aggressive! I would say a bit less compressed, more of a refined articulate sound IMHO.
     
  13. ducmike

    ducmike Silver Supporting Member

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    I have the JJ E34L's, KT77's and Siemens El34's. In my Dabeck I like the Siemens the best for over all loud tone. Just have that Marshall sound that's in my head. I am usings the KT77's now though, because they do sound better at the low volumes I have to play at church. I guess it's the better or more bottom end they have? I just put the Siemens in when I know I can turn up a little.
     
  14. crwnedblasphemy

    crwnedblasphemy Supporting Member

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    KT-77s are good. i have them in one of my splawns. They are great current production tubes. That being said, I just scored a pair of old Tesla El34 brown base tubes, and they are great as well. have them in my other one. They sound not as thin as the Mullard(new Sensor) that were in there.
     
  15. Rex Nomad

    Rex Nomad Member

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    I tried the JJ KT-77s in a Marshall Super Lead and in a 2203 and did not like them. They sound like a EL34 that's trying to sound like a 6L6 and not doing a very good job of it. The low end is tighter (which is nice). The mids are sharp, almost harsh and the highs are more piercing to my ears. More headroom. Less of the warm smooth early breakup that I'm after. Probably fine for cleaner amps.
     
  16. mailman

    mailman Member

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    Swapped the Chinese EL-34's out of my THD Flex-50 with KT77's and really prefer the extra bottom end & punch. Bought another pair of 77's to keep on hand. They're an EL34 PLUS!
     
  17. frankencat

    frankencat Silver Supporting Member Supporting Member

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    How do they bias up compared to EL34's?
     
  18. big mike

    big mike Marshall Voiced Moderator Staff Member

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    Not sure I understand. My amp that's fixed I set at 37ma with either.
     
  19. picnic

    picnic Supporting Member

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    I picked up a Koch Twintone here a couple of months ago. The amp can go KT77 or El 34 without rebiasing. It came loaded with KT77's and an extra pair of EL34's, both sets were Koch labeled. I used the KT's for two weeks to get an idea of the amps capabilites. I like the Fendery cleans, somewhere in the middle of DR and TR land. Plenty of bottom, I keep the bass around 9:00. The mids and highs are around 1:00. This amp can get real loud and stay clean too. The drive channel can go from a light DR breakup to a real distorted tone. I'm not into the real gainy side of things and keep the gain around 10:00. Just enough breakup to be different from the clean. I'm very happy with what I heard.

    I put in the EL's and played them for a week. They didn't have the sound depth or balls on the clean or drive channel the KT's did. Sounded good, but the KT's just sounded better in every way. KT's are back in and I'm digging this amp.
     
  20. cheesey

    cheesey Member

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    i got some free jj kt 77 to try in my shiva, anyone else done this with good results?
     

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