Yes, you can set up the sync box with a sound bar or AV receiver using ARC (Audio Return Channel).

Here's how to set up the sync box with a soundbar or AV receiver using ARC:

Original setup with a sound bar

 Sync box and ARC

Original setup with an AV receiver

 Sync box and ARC - option 1

 Sync box and ARC - option 2

Sync box and ARC- option 3

Sync box and ARC- option 4

Note: The WiZ sync box doesn't support eARC, which stands for Enhanced Audio Return Channel. eARC is an updated version of ARC that was introduced with HDMI 2.1. The sync box supports only ARC passthrough. It will automatically revert back to the ARC specification.