Knowing Sonos you probably will

be able to and it will all work fine. 
 

Then, they will update the app and it will all stop working. 
 

I wouldn’t give them another penny. 

I asked this question in the main announcement thread, and the answer is actually no.  You can play audio through the headphones, or the Arc, but not both at the same time.

This is a terrible feature and one I hope gets changed.

Picking one or the other is ridiculous.

I wish I would have done more research before buying 2 pair.

The whole idea is to be able to listen how and at whatever level you want.

The headphones seemed like a perfect fix for people wanting more immersion or that have difficulty hearing like my Dad.

Unfortunately, only he can hear anything now.