pre-amp unacceptable noise level?

Humming sounds like a grounding problem. Is your TT grounded to the amp or pre-amp? You might try moving it around to different components.

Are all you components plugged into same outlet? If not, try that. If none of that works, then try the cheater plugs.

Dave

I've tried cheater plugs with no luck. It's a Rogue Metis.

Sounds like you have a ground loop hum. This article should help you troubleshoot the problem.

Cheers,
John

Another cause of humming can be from locating a pre-amp too close to a power source, usually an amp on which some people like to stack stuff (ever noticed how many high end pre-amps come with seperate power supplies often connected to the pre-amp by a long cable), and proper cable dressing, that is, making sure all of your IC's are not near any power sources or power conditioners. I've had problems with both of those issues. Easy to cure. BTW this is generic advise - I've never owned a Rogue.

My Rowland 102 amp introduced a major hum into my setup. Turned out to be the cable TV. A Jensen Ground Loop Isolator fixed me right up.