Never having experienced ground loop hum...I received my new tt and phono preamp yesterday. Set up the tt and connected it to the input of the phono preamp. Connected the outputs of the phono preamp to the analog inputs on my Anthem AVM30 which outputs to my Sherbourn 5/5210a amp. I have had this system for years with NO hum or buzz. Connected to it are a DVD player, a SACD player connected via analog, and sattelite. Since connecting the tt there is a horrible buzz/hum that is more than a hum...its loud. You can hear the LP playing but the sound is completly lacking any sort of dynamics and at any volume over
-45 the hum/buzz threatens to harm the speakers. The phono preamp is a Parasound Zphono. I do not have cable tv anywhere in the system.
Is this a ground loop hum? Any suggestions or ideas? I'm thinking a bad phono preamp.