Marshall 9000 Series 50/50 Monoblock Bias Advice

Discussion in 'Marshall Amps' started by Travis_201515, Oct 26, 2021.

  1. Travis_201515

    Travis_201515 New Member

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    I have a pair of the Grey Face 9000 series Mono block amps... One Strange issue. One amp when you take it off of standby the bias climbs down to where it is set at where as when your monitoring setting the bias on the other Amp it climbs up to where it is set at. For example. One Amp switched off of stand by will be as high as 70mA and climb down to 38mA and the other Amp will start from 0 and climb up to 38mv.
     
  2. Sir Don

    Sir Don Well-Known Member

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    This might be best in the workbench forum.
     

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