crwdns2934241:0crwdne2934241:0 Patrick Martin

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Loud hum when connected to a guitar amp

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When I insert the ART Tube MP StudioV3 preamp into my guitar’s signal path there is a loud hum and the audio signal is weak. I’ve tried different configurations but haven’t been able to get a satisfactory sound. Could it be the tube?

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Art Tube MP AMP

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open