I would say that with dual subs you can have stereo bass if you mount them in the same plane as the main speakers if you use a single sub you need one with a blend circuit and again mount it in the same plane as the speakers both types work well for music but finding a good single sub with a proper musical sound is more difficult. Same plane is no more than two feet forward or back from the main speaker baffles.
Single vs. Dual Subs
It's common wisdom that dual or multiple subs help smooth out bass response in different spots in the room, but what about for a dedicated listening room with a fixed single listening position? What do two subs add to the music presentation that a single dialed in sub is missing provided that single sub is dialed in perfectly for the listening position?
Caveat: not interested in the SWARM method or multiple subs at the moment, strictly comparing single to dual subs
Caveat: not interested in the SWARM method or multiple subs at the moment, strictly comparing single to dual subs