Tv to soundbar to subwoofer

[audionewb]

Hello everyone!
Tv model: jvc lt-55ue76
Subwoofer model: Basscube 8S
Soundbar: Vizio 38" 2.1

Here's my problem:
I have the soundbar hooked to the tv via optic cable and it works. I have lost the subwoofer that came with the soundbar (Bluetooth). A friend gave me a basscube 8s (powered) subwoofer. I have tried hooking the sub to the tv and to the soundbar via RCA and can't receive a signal to the sub. I thought maybe the SW was defective but tested it with my receiver I have for another stereo system in the house and it works just fine. Any thoughts as to how to get signal to the subwoofer?
Thanks for listening!

 

[hang-the-9]

You can't unless the Vizio has a sub out jack, which it does not. If you want to use the sub with speakers, you need to get a receiver to connect it to.

 

[americanaudiophile]

I don't think a receiver will help since you can't connect the soundbar to it. You could try connecting a bluetooth receiver to the powered subwoofer and pair it with the soundbar.