OK I have my empeg running to my head unit which runs to an amp. Here's what happens. Every now and then I get a very low hum from my sub. Sometimes it's very faint, other times it's somewhat loud. It's not affected by either the Empeg volume or HU volume controls. It's not always there either. Sometimes when I slide the empeg out and back in it goes away.

Well a couple of days ago I was messing around with it some more. What I did was pull the empeg out about a centimeter or two so it was still connected into the back connector in the sled so the empeg would still work, but the hum went away.

To put it shortly, I get no hum when the empeg is slightly out of the sled, but varying levels of sub hum to sometimes none at all when the empeg is fully in the sled.

Can someone explain what is going on here? And also if there is an easy fix for this. I really don't want to have to reinstall something.

Thanks!