High end power cords? I wholeheartedly agree, heavier is better. Beyond that; maybe, but... Read my "compromised hearing" explanation from my previous reply.
I recall from another forum a member having "ah hah moment" from, he claimed, bass response from upgrading from the stock removable 18 ga to an inexpensive 14 ga upgrade. I plan to mod what gear I can to take advantage of this inexpensive, undeniable upgrade. Currently, of my system's 11 amps & subs only one of them has a removable PC. That 230VAC sub came to me needing some surgery to make it work. While I was at it was easy enough to install the EIC not to mention a generic 4' PC.
My add'l $0.02
Tony