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Grounding questions

I’ve had an issue with a slight hum through my system for a long time. System consists of Jolida Fusion Preamp and JD1000P amplifier. Both plugged into Futman Elite 15 power conditioner. It’s not dependent on any sources. Hum is there when amp is on. 
 

I have a dedicated line for the outlet to the Furman. Hum does not increase with higher volume. 
 

Maybe it’s an issue with the power amp but it could be an issue with the house wiring. The house is 62 years old and the fuse box is original and not grounded. Before I pay $800 to have it grounded, what do you think is causing the hum? It’s not cable related as I’ve swapped interconnects. The pre and amp are connected by a balanced cord. 

128x128mschott
maxwave's avatar
maxwave
909 posts
 

Take your amp to a friend and try it there.

Post removed 
mschott's avatar
mschott OP
129 posts
 

Yes a very good electrician told me it’s not grounded. There is a TV but no cable box. I stream. 

Post removed 
lowrider57's avatar
lowrider57
5,393 posts
 

@mschott

You’re fortunate to have @jea48 on your thread. I have one question, an electrician ran a dedicated line for you but left the service panel without a ground?

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