Old Sub woofer's cable is not compatible with the "sub woofer out" in the AVR (1 Viewer)

[Ellyana]

Hello everyone, our old LG "home theater in a box" sub woofer's cable is ran through a hole and sealed with a wooden wall from one side (We can't access it to change the cable) and from the other side (the one you connect to the receiver) it has a weird jack:

How do we fix this so we can connect it to the receiver's "subwoofer out"?

 

[Wayne A. Pflughaupt]

Sorry, but you can’t. Your old sub was passive, meaning the LG “HTIB” internally provided the amplifier it needed.

You weren’t specific, but it sounds like you now have a traditional A/V receiver. They only have a line-level output (the RCA jacked labeled “Sub”) that would go to a so-called “active” subwoofer with its own built-in amplifier. So, even if you rigged up some kind of adapter to connect to the AVR, it would not work.

Your options:

1. Buy a new subwoofer (the active kind).
2. Buy an external amplifier to power your LG subwoofer. It would connect to that “Sub” output jack. You could then cut off that “weird jack” and connect it the amplifier’s speaker output.

Regards,
Wayne A. Pflughaupt

 

[David Willow]

I'll chime in with my usual warning.

If this is true that you got a new 'traditional' receiver be careful with the speakers you plug into it. It is possible the speakers from the old LG could damage the new receiver. Check to make sure they are 6 or 8 ohm (4 may work as well). If they are 3 or 2, don't use them.