GK 400RB IV woes

Discussion in 'Amps [BG]' started by Indiana Mike, Apr 5, 2014.


  1. Indiana Mike

    Indiana Mike

    Joined:
    Nov 18, 2005
    Messages:
    1,932
    My 400rb has developed an issue.

    the clip led by the input never illuminates no matter how much I put into it .

    I can overdrive the amp into 100% metal distortion .

    Still loud as hell .


    Off to the service center I suppose

    Anyone ever experience this issue?
     
  2. AstroSonic

    AstroSonic Supporting Member

    Joined:
    Dec 10, 2009
    Messages:
    731
    Location:
    rural New Mexico
    The bulb is probably burned out - not a major repair. Also not essential - it's just 'training wheels'. You can use the amp without it. You'll just have to pay attention to your sound, listening of clipping.
     
    Jay Q likes this.
  3. B-string

    B-string Gold Supporting Member

    Joined:
    Nov 21, 2008
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    16,905
    Location:
    Lake Havasu City, Az USA
    It's actually an LED, not saying an LED can't fail. If the amp still functions fine I would not worry. Even with the pad switch off it take a hot input signal to set it off. NO controls other than the pad switch have any effect on the clip light. It is only driven by the input to the amp's signal strength. It is set to warn you you are approaching clipping of the amps first stage only (turn the instrument down or engage the pad if it is staying on hard).
     
  4. Indiana Mike

    Indiana Mike

    Joined:
    Nov 18, 2005
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    1,932
    I think I'll leave it alone
    Thanks
     
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