In all my power conditioner experiments, I have noticed preamp sound better on NOT balanced power. 120V0V sounds better. The balanced power from my Furman REF20i and my personal preamps (I own five) the preamps tend to sound cleaner, but less 'full' in the midrange on balanced power. And I like them on regular 120v/0v neutral AC better.So my preamps are conditioned from the Furman conditioner, but not via the balanced lines.No problem for sources with balanced power....