I'm not sure what you mean. I don't see any subs located in the wall. There are 5 ceiling panels installed, three up front (center and front surround) and two in the rear, for rear surround. It looks like a 7.1 panel, but I'm assuming it would use separate free standing side surround if I was going to use 7.1. I'm planning on getting a 7.1 receiver, but I want to use those two separate channels to provide sound on my back patio.