Yes, thanks for asking. Found it in an email from 2015. There are benefits to never deleting!
https://www.monoprice.com/product?p_id=2684
Monoprice 50ft High-quality Coaxial Audio/Video RCA CL2 Rated Cable - RG6/U 75ohm (for S/PDIF, Digital Coax, Subwoofer & Composite Video)
Hi everybody -
In my basement I have what should be a good quality subwoofer cable with RCA connectors (monoprice) running through the wall to my subwoofer. I had planned to someday end that in a wall plate with another cable to connect to the sub but never got around to it, so it just ran...