Axiom Home Page Forums General Discussion Technical Questions Hum from AX500A Axiom Subwoofer.

First you need to do some diagnosing and truly eliminate a possible ground loop. Start with just the sub turned on and nothing connected to it, does it still hum? If it does then the problem is most likely in the sub's amp, if it doesn't hum then you quite possibly have a ground loop problem and usually the subs cable or TV cable or similar feeding one of the components is the problem and removing a cable one at a time with the sub connected will help you find the culprit.