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Crate MX65R Amp Noise

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  • Crate MX65R Amp Noise

    Hello All,
    Amp powers up fine, sounds fine when i run clean channel, or go direct into insert plug, bypassing everything and just using power amp. Problem is when i engage (star trek fans?) either of the two gain channels, (it has low dB and higher dB settings) i get a lot of noise out of the amp. signal comes through but has this loud buzz along with it. Anything past 1 on the level setting and it sounds like static ##@%*. Any suggestions about where to start? or what are likely the most common problems? Thanks for any help.
    I have a schematic on the way from Loud Technologies but its not here yet.
    Last edited by guitarrufus; 07-12-2011, 02:18 AM.
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