I would give Bill Parish (GTT Audio) a call. He's an EAR dealer and also markets the Absolute Power Cord. The Absolute is an inexpensive, well made and properly tuned power cord suitable for line level components.
I got a bit more body in the sound when I replaced the stock power cord with a Delta Labs PC on my EAR 834P. You will realize a more dramatic improvement if you upgrade the tubes. I am using NOS Mazda 12AX7s. Other 12AX7s with good reputations are the GE 5751-WA Black Plate, the Sylvania black plate & Gold Brand black plate and and the Sylvania Gold Brand grey plate gold pin.
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