Any good power cords with musical fidelity KW500?

I recently acquired a KW500 and is quite happy with the performance. With the stock cord, the treble is less refined than my pre/ amp set up but bass and sound stage are amazing. Front end fed by hydra 8 via a Elrod EPS-3S and various cords. Shunyata python works great with current pre-amp/amp set up but KW500 needs a 20amp plug. Are there any 15mp to 20 amp plug that does not degrade to much?

Any suggestions for pcs?