Spectral equipment is extremely sensitive to grounding differentials. Unless your wiring from the amplifier outlet and front end outlet are absolutely identical in their length from your breaker box to those outlets, you will experience a problem with hum. Float the ground to your amps. Run your preamp grounded and the MIT interconnects will then be the ground for the amplifiers. The result will be dead quiet with everything still grounded. This is how I run my Spectral equipment. It sounds fantastic, dead quiet, and there has never been a problem. Give it a try, and you will see!
Just making sure I understand correctly -
So I would run DAC to preamp balanced and preamp to amp single ended (this is where I am using the single ended MA-X now), or do you mean just have AC to the preamp grounded.
AND I float the ground on the AC cords to my amp? How do I do this? I now have the ground wire on my plug disconnected, but this probably won't work with a shunyata cord (I think). I don;t want to disconnect the ground wire in the outlet (code violation). I can also use a cheater plug. How do you "float" power to amps.