Help! New Nagaoka MP 500 Cart Makes Hum Ground Noise

You need to have subwoofer and turntable plugged into the same circuit otherwise you’re grounding your table to your subwoofer if sub is connected on another circuit and that creates a ground loop. Or disconnect sub ground wire from phono stage. Why do you even ground the sub?

Thanks @audphile1 but it did not help. Good idea, though. 

Update: It has to do with the RCA cables that came with it. I found, with the volume high, if I tap the cables with my fingers I can hear the tap in the speakers!

What do ya'll make of that? These are brand new that came with the turntable! 

If the hum is audible above normal listening levels don’t sweat it. In all honesty what expectations can you have from a built in phono in your integrated? It will perform differently with different cartridges. Some will match better than others.

Also, if you have any network components close to your phono stage or cartridge you will subject it to RFI. Routers, wifi extenders, streamers should should be at least 1-1.5m away from phono stsge or cartridge. If turntable is close to amplifier the power transformer in the amp may also cause interference. Move it away. 

@audphile1 I am new the turntable hobby so I am learning... if you can please tell me:

1) For the Luxman 595 amp which is about $12,000.00 - should I expect no noise in the mm line? Also, the hum is there but less so even if I am listening to my streamer. I have to unplug the turntable RCA plugs completely to get rid of background noise compelety.... is that to be expected also?

2) Would I have this same issue if I would of bought the 891 Moon preamp with it’s built in phono stage? That one is 25k but I wouldn’t want to go down that road if the expectation is I would get a hum of any kind in the phono stage. 

I am using a cat  network cable for my streamer, so no wifi being used. 

I can turn up the music above the MP-500 but still the hum is pretty loud where it would be upsetting not to have a black background.