Thanks for the comment! Those are not subs on the outside. I have two independent systems the small towers are Definitive Technology 9060’s (6) total that are the surround speakers on my Marantz Cinema 30. There is a matching center channel as well as their top line ceiling speakers for the Atmos experience. The theater pieces are under the TV center. The two subs SVS 4000’s on the sides can be used on the analog system as well as the  Atmos; I rarely use them for two channel listening the Tekton Moab’s have a fantastic low end.