Here at Grimshaw Audio, the speakers are custom-designed to give the best performance within the design criteria. As a product of the experience I've gained in designing and building my own boutique cabinets, I'm happy to offer a speaker design service.
For reference, please watch the video. This was with one main speaker and two subwoofers per side, all running on a single 13A mains socket. This is high performance audio from an exceptionally compact and efficient system.
If you're interested in a set of bespoke speaker plans for your application, get in touch to discuss your requirements.