Across 14 features we can compare from the published specs, the Polk Audio MagniFi Max AX comes out ahead on 5 and the Denon Home Sound Bar 550 on 1. The biggest difference for movies is height: the Polk Audio MagniFi Max AX has 2 ceiling-firing channels and the Denon Home Sound Bar 550 has none. Only the Polk Audio MagniFi Max AX comes with a subwoofer, which matters when comparing the prices.