stereo 90 Rogue amp hum noise

And does the hum remain at the same level regardless of where the volume control is on the dial?

And does this noise remain when nothing else is plugged in? Only the Rogue into the speakers with no RCAs attached to the amp (best to disconnect RCAs at the amp so they don't act like antennas).

Did this noise just begin? Any changes in your system or set-up?

If that is the case, sounds like a ground loop to me. Look through threads here and elsewhere for potential fixes.

And/or give Rogue a call.