Bob, Since 19364 is just plain old unshielded multistrand 14AWG in cheap PVC, why not just use the thinner-PVC 19354, and save 25%? Or use the double-shielded Teflon-insulated 12AWG 83802 for just $2/ft? Very clearly a superior cable for audio use. I can understand using the 19354/64 series for long cheap extension cords for HT, etc., but for better-sounding audio PCs I would expect that DIY'ers would prefer prefer an all-Teflon shielded 12AWG cable at only $10 more per PC.
More interestingly, I do agree that using good duplexes is important, but as long as minimum criteria of large-mass, triple-wipe contacts and strong screw-clamps, why would there be any difference among those that share these necessary, and perhaps sufficient criteria? I've torn apart Pass & Seymour, Cooper, and Hubbell 20 amp 5352, 5362 and 8300 dupes, and they're remarkably identical. Do you think the all-brass backstrap of the "62" and 8300 is important?
I wouldn't think so, and like the 5352s for value and VERY tight contact in all three of these manufacturers. The only one that seems to fall short is the Leviton, so far.
Thanks for your help.