Have you tried plugging the phono preamp into other inputs on the ARC? Perhaps unplug the digital input and plug the phono preamp into that input since you know it works fine. The fact that the hum was still present with the Shiite phono preamp says to me that the phono preamp itself is not at fault. If you still have hum when the Allnic phono is plugged into the digital inputs, then I would suspect a ground loop issue. I would try a cheater plug on the AC line for your Allnic. Back when I had an ARC linestage, I recall a recommendation that if there was a ground loop problem the linestage should be the only component with its AC plug connected directly to the wall outlet; all other components should use cheating plugs to float their chassis grounds.
Pre amp ruining analog
I recently obtained an Audio Research Ref 6 which works wonderfully well for digital but creates such a whine and hum when I try using it for vinyl I can no longer listen to it. I've spent a lot of money on my analog set up and enjoy vinyl enormously so you can imagine how frustrating this can be.
I've tried all the known remedies; cheater plugs. grounding from the tone arm to all components, unplugging my cable box and wireless router(which of course cannot be a long term solution), using different inputs, switched rca and balanced interconnects... I don't have a lot of room in my apartment so I can't go moving components far away from each other. I could go back to ss but I'd prefer to keep the arc because digitally it creates such beautiful music compared to the ss pre I had before. And it would be a hassle to sell needless to say.
My amp is a vtl s200(shortly switching to a Pass 350.8) which created a slight hum for vinyl which was masked by the music but the tube pre makes lps intolerable. My phono pre and head amps are allnics(when replaced with a Shiite the hum was still there. When I had a ss pre amp and amp the allnics created no hum at all.) Turntable is a vpi superscout with 3D tonearm and koetsu blue lace.
Any ideas before I am forced to go back fully to ss? Tubes are so musical and warm but they seems to come at too high a price.
I've tried all the known remedies; cheater plugs. grounding from the tone arm to all components, unplugging my cable box and wireless router(which of course cannot be a long term solution), using different inputs, switched rca and balanced interconnects... I don't have a lot of room in my apartment so I can't go moving components far away from each other. I could go back to ss but I'd prefer to keep the arc because digitally it creates such beautiful music compared to the ss pre I had before. And it would be a hassle to sell needless to say.
My amp is a vtl s200(shortly switching to a Pass 350.8) which created a slight hum for vinyl which was masked by the music but the tube pre makes lps intolerable. My phono pre and head amps are allnics(when replaced with a Shiite the hum was still there. When I had a ss pre amp and amp the allnics created no hum at all.) Turntable is a vpi superscout with 3D tonearm and koetsu blue lace.
Any ideas before I am forced to go back fully to ss? Tubes are so musical and warm but they seems to come at too high a price.