Cordless subwoofers?

I have four subs in my two channel system and two are connected wirelessly. No issues at all.

@big_greg

No delays or lag in timing at all?
If you don't mind me asking, what subs are you using?

 

Starting at $600, Paradigm has fantastic subs that have Wireless Capability with the additional purchase of an add on module that plugs in the back.  
The Defiance Series Subs also have App Control via Bluetooth that allow you to set up the sub from your listening position.  You can run up to four subs individually in one system with the App.  
All this along with Anthem ARC Genesis Room Correction built in.  Starting at $999, the Defiance X Series subs are made in Canada.  
https://www.paradigm.com/en/ported/defiance-v10

Nothing I can detect. I'm running two Rythmik F25s and two SVS SB13 Ultras. One of each is wireless. 

I have the Velodyne wireless adapter with my REL r305 and it works great