Several years ago my apartment had cable TV / internet installed and the cable company (now out of business) used this kind of cable:
View attachment 18306
It is about 35 feet long with same connector both ends. I am thinking it could be used now, with RCA adapters on both ends, as an LFE cable to connect a second subwoofer near the opposite wall of my apartment. Any thoughts? Or should I forget this idea and just buy a super long RCA cable?