Hi,
UL has listings for complete products (UL) ......
........and components (Ur) recognized, which means it must be used in a tested product - not by itself.
If you go to an electrical supply house and buy readily available high grade UL Listed cable & plug components - you can build your own cable...... as long as you've wired it properly. If these companies are using high grade components and proper build you should be fine.
FYI - most of the "audiophile" wall receptacles that sell for hundreds of dollars on line are rebadged Hospital grade receptacles. They provide a more secure connection. Start with this before you purchase cables.
Hope this helps
UL has listings for complete products (UL) ......
........and components (Ur) recognized, which means it must be used in a tested product - not by itself.
If you go to an electrical supply house and buy readily available high grade UL Listed cable & plug components - you can build your own cable...... as long as you've wired it properly. If these companies are using high grade components and proper build you should be fine.
FYI - most of the "audiophile" wall receptacles that sell for hundreds of dollars on line are rebadged Hospital grade receptacles. They provide a more secure connection. Start with this before you purchase cables.
Hope this helps