Bias problem with Holton Nxl 800.

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Erlend Sæterdal

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Joined 2007
Hi I have finnished a new Holton off Many. The moduls is Holton NXL 800. Exicon Mosfets Dual Die. 200 ma trough each set off Mosfets. Voltage 2 x 58 VDC. And 2 x 67 VDC for input. For input CLC with Hammond 156 R Chokes.

I think this Amp sounds hard in midrange and treble and bass is thin. I wonder if IT could be caused by the High Bias. Have done Lots off Holtons without this problem. Heatsink is only 44 degrees celsius.
 
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