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Regarding my hum problem, I phoned a tech who figured that since the hum went away when I touched metal, it was a likely a 60 Hz hum/shielding problem. But he suggested to first take it to the shop and try it there compared to another RBX170 to make sure there was nothing defective. The shop...

Thanks for the reply, Ghook. My research (such as it is) tells me that if it’s a ground wire problem, then touching the strings or other metal wouldn’t reduce the hum. But in my case, it does reduce the hum. On one hand, that would indicate an EMI shielding problem. On the other hand, the hum...

Hi bassfolks, Total noob here - just got my first ever bass in Old Violin and spending time learning with the Complete Idiot’s Guide. Electrical question for you all. I know some folks have mentioned “noise” and shielding the cavities. My RBX170, brand new from GC, has a hum when I’m not...