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Technical Question

Discussion in 'Amps and Cabs [BG]' started by count_funkula, Aug 1, 2001.


  1. I have an Ampeg B50R that has a problem with the gain (volumn) knob. If you turn it all the way down and then slowly start turning it up you get no sound until it's at about 1/8 of a turn and then it's too loud. I can't play at a real quite practice volumn. It's still under warrantee but if there is something easy I can do that would beat sending it back to Ampeg.

    Thanks.
     
  2. ThunderStik

    ThunderStik Guest

    Jun 25, 2001
    Claremore OK.
    Does it have a seperate gain and volume control ?
     
  3. ThunderStik

    ThunderStik Guest

    Jun 25, 2001
    Claremore OK.
    What controls does it have? How do you have them set?
     
  4. It has the volumn knob, Low, Low-Mid, High-Mid, and Treble. Real simple setup.
     
  5. Is it a tube amp? I can't remember... If it is, check the tubes... If it's used it may have been re-biased with higher gain tubes... Mesa rectifier amps have HUGE gain where the volume is almost nothing until you get to a certain point then it's LOUD. It ALMOST makes me wish I played guitar. (Of course I'm looking forward to a StingRay)
     
  6. Luis Fabara

    Luis Fabara

    Aug 13, 2000
    Ecuador (South America)
    Audio Pro - Ecuador
    Did you mean B5R?
    IF so, there is a gain control and a MASTER Control.

    Gain will adjust the Pre-stage gain, and master the actual power output.
     
  7. Luis Fabara

    Luis Fabara

    Aug 13, 2000
    Ecuador (South America)
    Audio Pro - Ecuador
    Oopps..
    Im sorry.
    I forgot about the B50R Portaflex RocketBass.
    In that case I guess it could be the Gain Pot that is broken. (No, not the smokable one).

    You will have to use your warranty.
     
  8. Bob Lee (QSC)

    Bob Lee (QSC) In case you missed it, I work for QSC Audio! Gold Supporting Member Commercial User

    Jul 3, 2001
    Costa Mesa, Calif.
    Technical Communications Developer, QSC Audio
    It looks like your gain control is broken and needs to be replaced. The symptoms suggest that the resistive element in the control has a break in it.

    Ask Ampeg if there's a local authorized service center that does warranty work.

    -Bob