Tonal differences between a 6L6 and KT66?

Discussion in 'Amps and Cabs' started by MikeS, Feb 9, 2008.


  1. MikeS

    MikeS Member

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    What are the tonal differences in a KT66 and a 6L6 tube?
     
  2. davebc

    davebc Member

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    Obvious both great tubes. I've had 6l6's in many, many amps through the years, but was always intrigued with allure of KT66's. Finally, they came loaded stock in my Louis Electric BluesBreaker,:dude :dude !! Amazing tubes!
    The kt66's have an absolutely huge soundstage. Everything sounds bigger, and as thick as a Texas crude milk shake.
    I love them.
    Depending on how descriminating you are, the challenge is really finding a good high reading set.
    I would part with the dough for an original set of GEC's if I felt certain they were in fact "nos" and not "anos"
    or flat out spent.
     
  3. Blue Strat

    Blue Strat Member

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    Think of a 6L6GC as a chocolate milk and a KT66 as a milkshake.:AOK
     
  4. davebc

    davebc Member

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    I like that anolgy Mike. Actually, this thread just inspired me to go in search of GEC KT66's for my BluesBreaker. I noticed even you were sold out. I'll check back.;)
    Maybe a dumb question; but can you really hear $350.00 difference in tone?
    Are the GEC's really that superior in tone. Obviously, they will outlast their Chinese counterparts without breaking a sweat.
     
  5. Blue Strat

    Blue Strat Member

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    If you mean "do they sound 7 times better than a $50 pair of Chinese KT66s?" I would have to say no, but that's not why they cost 7 times as much (actually, more than 7 times today).

    BTW, there's supposed to be a pair of GEC's in a new stash that arrived Friday. Haven't checked them out yet though.
     
  6. riffmeister

    riffmeister Gold Supporting Member

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    I think the differences in sound are similar to the differences in appearance.

    One is fatter than the other. :D
     
  7. teleking36

    teleking36 Supporting Member

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    hey mike!

    i'm thinking of upgrading the KT66s in my /13 EDT 13/29. should i go with the valve arts or some NOS GECs? how much of a difference will i notice?
     
  8. AaeCee

    AaeCee Member

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    That's perfect! 6L6 = cleaner, KT66 = fatter.
     
  9. davebc

    davebc Member

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    And, one keeps your wallet fatter:roll
     
  10. mountain blues

    mountain blues Member

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    One way I think of the difference in tone between the Valve Arts and the GEC KT66 is kind of like the comparison between how many different shades of color you get in the 24 Crayola Crayon box versus the 64 crayon box.

    Whether that makes the GEC's worth what they go for now...
     
  11. Blue Strat

    Blue Strat Member

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    If you're willing and able to spring for the GEC's, have at it.

    How much difference will you notice? Hmmm...let's see. How much difference will I notice between a bone in ribeye cooked at home versus at a high end steak house? ;)
     
  12. dale661

    dale661 Member

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    KT66's are a bit thicker and rounder sounding than a 6L6GC to me. KT66's are springy feeling, whereas a 6L6GC is a bit harder to the touch. That's just my initial thoughts in the amps in which I've had a chance to use those particular tubes.
     
  13. dorianadams

    dorianadams Member

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    All 6l6 tubes do not sound alike. RCA blackplates are very rich and smooth with a not so tight bass but tall bottle Sylvania 6l6s are very clean and tight. Make your super sound like a Hiwatt.
     
  14. davebc

    davebc Member

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    Mike, would you please be so kind as to send each of us a set of GEC's so that we may all become enlightened.
     
  15. Blue Strat

    Blue Strat Member

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    Sure, they'll be listed on my site shortly for convenient online ordering. :D
     
  16. jzgtrguy

    jzgtrguy Member

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    I had GT 6L6GE's in my Rivera Quiana and I had it retubed with KT66s and they were awesome. It gave the amp a more "vintage" sound. Brighter, loved them.
     
  17. 61Ephramite

    61Ephramite Supporting Member

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    Hey Mike,
    My Hot Rod Deluxe uses 6L6GC's/5881's. Are there any problems with using KT66's with this amp?
     
  18. Blue Strat

    Blue Strat Member

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    Possibly. KT66s demand quite a bit more heater current than 6L6s and this could spell trouble for your power transformer.

    Personally, I'd avoid the temptation.
     
  19. MikeS

    MikeS Member

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    I can't comment on the different tone, but I did lift this from the Dr Z forum.

     

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