I'm trying to look for an upgrade on my power cords for the Reference20. I'm wondering what you are using for Nuprime amplifiers that fit very well.
My experience with Nuprime and a Furman power conditioner that reads amperage usage, made the Furman technical helper to think I had a defective one. For my amp and preamp were hardly drawing power.
For that reason... The type of highly efficient amplification used by NuPrime leads me to believe you will not need the big hefty cords used for high current analog type amplifiers. I own a NuPrime ST-10 and use the following power cord with excellent results.
Here is what I am using.
Pangea Audio AC 14SE MKII Signature Power Cable. http://www.audioadvisor.com/prodinfo.asp?number=PGAC14S2
I learned from a power cord designer (and audio designer) that shorter cords will not sound as good as cords at least 6 feet (2 meters) long.
He explained something to me about how the power cord's copper acts like an electron reservoir.... Be that true, or not? The six footers do sound excellent with any equipment I have used so far. You can spend much, much more if you like. The man who designs the Pangea power cords has also designed some cords for other companies that sell for much more...