Hey, Emotiva actually brought product (Ultra subs) to market.
Based on the page, features, manual, etc. - this all looks completely ordinary to me.
Amp, driver, sealed box. No esoteric R&D there.
Having a good quality sealed sub at these prices seems pretty unordinary to me. If these subs can reach the frequency response that is claimed within +/- 3dB then this would be something great at this price point.