external speaker hum, Disklavier Mark IV

[Lloyd Randolph]

I'd value the group's views on what might be causing the hum evident from my Disklavier Mark IV's external speakers and how I should eliminate it.

A few months ago, with the group's expert advice, I replaced my Disklavier's hard drive with a solid state drive, so I don't think the hum is coming from a failing hard drive.

The hum is especially evident from the speaker creating the left side audio (although I can hear a bit of it on the right side, too). And I hear the hum when whatever speakers I've connected, i.e., both the powered Yamaha MSP3D (original equipment), or passive speakers with an external amplifier.

Many thanks,

Lloyd Randolph

[Geoff Ward]

Does the hum stop if you unplug the audio cables?

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