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60 Hz Hum from Powered Sub

Hi All-=

I have an older (late 90's?) Tannoy PS110 powered subwoofer. It has a 3-prong (grounded) permanently connected power cable. Over the last month it has developed a 60 Hz hum. I've plugged it in different locations in the house to rule out ground loop. The hum is present whether there is an audio source connected or not. Is it time to just move on or is this something worth repairing? Could this be something simple, and if so, how can I diagnose it? Any suggestions are appreciated!

Thanks, 

G
128x128spacecadet65
yogiboy's avatar
yogiboy
5,701 posts
 
Try a cheater plug and see if the hum goes away!
https://www.amazon.com/GE-Polarized-Grounding-Adapter-14404/dp/B00B7PK1TC/ref=sr_1_8?dchild=1&ke...
spacecadet65's avatar
spacecadet65 OP
58 posts
 
Will do! Why does that work? Sorry, I'm an electrical noob here...

G

imhififan's avatar
imhififan
2,205 posts
 
Is it time to just move on or is this something worth repairing? Could this be something simple, and if so, how can I diagnose it?

Probably electrolytic capacitors failing caused the 60Hz hum, you can find a good condition PS110 for less than $150!
If you want to diy, replace all electrolytic capacitors.
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