If your query it to the BT Marshall speaker(s) then see if it has a hardwire input.
My limited experience with BT speakers being fed by a SmartPhone (maybe an iPod in one instance) has been that the hardwire hookup sounds a lot better than the BT hookup.
Patch cords for such are readily available.
Not certain if the new phones/Pods even have hardwire output capability.
DeKay
