Dirty voltage PC Power Supply


2015-12-29 5:14 pm
Hello everyone,

I just got a brand new PC power supply and I have a little problem with it.

First of all I'm using it to power up a car amplifier, the issue is that there is a constant humming noise coming from the subwoofer and the only way to eliminate this is by using a car battery, so the problem is not the amplifier...

Can anyone please tell me how can I get rid of the humming noise, does removing ground prong would make any difference or is there any modifications that can be done to the power supply?

p.s.: worse comes to worst I'll be end up using it as a bench power supply, but for now I would really like to know what makes this humming noise ...

Thank you!!