For a subwoofer with an rca connector any rca cable will carry the signal.
Single rca cable for subwoofer.
The connection itself may require a few wires or a single rca cable.
If the cable is split on one end a y cable for both right and left channels then plug in both the r and l ports on the subwoofer.
The subwoofer may be passive without any internal amplification or active with an internal amplifier included to increase the volume.
But some manufacturers add special features to an rca cable and label it subwoofer.
It depends on a particular system and its features.
Rca cable for subwoofer.
Ollgen rca video cable digital audio coaxial cable with male to male single plug a v extension cord for subwoofer car rear view parking buckup camera 5m 16feet 4 3 out of 5 stars 80 7 99 7.
If the subwoofer s line in uses rca cables and if the subwoofer out on the receiver amplifier also uses rca simply plug in using an rca cable.