I have a movie room that’s 18’ x 39’. Two sub 4’s are not sufficient. The rear of the room is dead compared to the front. We have two Sub 4’ in the front corners, and we want to add two more Sub 4’s in the rear corners of the room, but Sonos does not allow more than two subs to be connected to an Arc Ultra.
Is there a way around this without getting two sonos amps and running another brand subwoofer from a sonos amp?