I would say 80% of the time, my turntable (Garrard 95B) sounds fine on my Onkyo 701 through the standard phono preamp. But now and then, I get weird feedback. It's not very much, but it's enough to bug me.
Today, I tried to isolate the issue. I unplugged the turntable from the wall, and I still heard the feedback. I have the phono cables extended to reach the preamp using shielded av cables. I unplugged the phono cables from the extensions and still heard feedback. My amp was only silent after I unplugged the cables entirely. So I have to believe that the cables themselves are causing this feedback. I isolated them away from all the other cables that could possibly be causing any trouble and pulled them out around the other side. I plugged them in, and I get feedback.
So I guess my question is... is it the cables... is it my Onkyo? What could be causing this annoying hiss/buzz noise?
I'm going to try some more things... I just want to get this figured out. It sounds so good when there is no noise... but the noise just makes life miserable for everyone.