THD Univalve question

Discussion in 'Amps and Cabs' started by Dr. Tweedbucket, Feb 20, 2008.

  1. Dr. Tweedbucket

    Dr. Tweedbucket Deluxe model available !!!11

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    .... For those of you that have experience with this amp, is the volume difference between the hi ( rock ) and low ( roll ) inputs supposed to be a drastic difference? :confused:

    I just got one and it sounds great on the rock position and is pretty loud with the larger tubes, but on the roll position I have to crank it all the way up to get a decent volume. I mean, if the volume is at 4 on the rock position, I have to crank it to 10 on the roll position to get the same level of clean volume out....... is that the nature of the beast?
     
  2. Ed DeGenaro

    Ed DeGenaro Supporting Member

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    Yup, that's how it is, reason being that the low gain input only uses the second half of the first pre-amp tube.
     
  3. Dave

    Dave Member

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    Yep, that's how it is.
     
  4. es125luv

    es125luv Member

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    exactly...

    if you need cleans with more power... try a kt88 + 12AT7's or a 12AU7... on the rock input... I used this setup for years.
     
  5. Dr. Tweedbucket

    Dr. Tweedbucket Deluxe model available !!!11

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    oh, I see ...... well at least I know it's not broken :)


    Thanks. I guess then maybe the best balance for that amp is to run a 12AU7 up front, that way it may have more clean headroom, but then you can still crank it up into a nice crunch. ..... and screw the Roll position altogether.

    I'll have to try that combo tomorrow. :confused:
     
  6. Dr. Tweedbucket

    Dr. Tweedbucket Deluxe model available !!!11

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    Yes ! you beat me to it ! ! :BEER I'll have to get a KT88 to try.
     
  7. es125luv

    es125luv Member

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    and this setup is PEDAL FRIENDLY!!!

    ... but you can also use a 12DW7... it is half 12AU7 and half of a 12AX7... a cool tube to play with on the Rock Channel....
     
  8. Dr. Tweedbucket

    Dr. Tweedbucket Deluxe model available !!!11

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    I have a xotic RC clean boost that I'll have to try on the Roll channel :)
     
  9. Whamosi

    Whamosi Member

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    A good 6550 in the power section will also power up the cleans a bit. The ROCK channel is like a power booster on the signal... but sending it to the power tubes instead of the front of the amp, like a booster pedal.
    At least that's the way I like to visualize it for it to make sense to me.
     
  10. JoshuaTSP

    JoshuaTSP Senior Member

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    So, how are you liking the amp so far?

    (if you don't like it PM me *shameless spam*)

    :moon
     

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