Question Where to plug sub into reciever

[GingerGuy36]

I just bought a Polk PSW10. My reciever is a Pioneer VSX 520. The sub only connect through RCA. My recievers sub pre out is coaxial. Where would I plug the RCA from the sub into the reciever? Image is of back of receiver https://ibb.co/3vP9nck

 

[Alabalcho]

Preout from receiver ->> stereo RCA cable ->> sub.

 

[xicojo4596]

Since the receiver's pre out is RCA, you wont be able to connect it directly. You can grab a simple coxial to RCA cable. Should be relatively chep.
You can find the process on connecting subs and receivers or amplifiers here:
https://boomspeaker.com/connect-subwoofer-to-receiver-amplifier/
Its strange though since normally most receivers have both coxial and RCA pre out.