Former PC Skeptic
A few months ago I bought a pair of VTL 300 deluxe mono block here on the gon. They came with 18 awg, computer type power cords. After using the amps for a while, I felt the PCs and they were kinda warm. Not a good sign. Needing bigger PCs I did the following.
I bought female Watt plugs from partsexpress.com. Then went to Home Depot and bought three sizes of CAROL Industrial power cord and Industrial Grade male plugs. The sizes were 16/3, 14/3 and 12/3. All the materials, including the Watt plugs cost around $100.00. Over a weekend I used each size cord for a few hours. There was an audible difference with each size. Power Cords do made a difference. I preferred the 14/3 cords.
Note: I have a dedicated 20 amp outlet.