Glory, I looked back at my REF500M review on PFO:
http://positive-feedback.com/Issue50/bel_canto500.htm
I quoted peak current for REF500 at 30 Amperes. This value may not be correct. The BelCanto page for the amp asserts peak current to be 35 amperes instead:
http://belcantodesign.com/Belcanto_REF500M_Amplifier.html
Like a lot of other amps, REF500M do benefit from high current power cords... e.g. the Furutech I discuss in the article. One thing to consider is that while class D amps have negligible idle/bias draw, they can instantly draw a lot of current on louder/complex passages and transients. After the review was published, I tried Shunyata King Cobra CX on them with very desirable results. I suspect that current Shunyata Python Z-Tron may work as well while being price more commensurately with the amps. Shunyata wires in the CX series and beyond appear particularly apt at blocking potential hash generated by some ICEpower amplifiers, without ever acting as frequency-limiting bandpass filters.