Denon expands its soundbar range with two HEOS-enabled premium models | What Hi-Fi?
Customer Reviews: Denon Home Sound Bar 550 Powered 4-channel sound bar with Dolby Atmos®, DTS:X, Bluetooth®, Amazon Alexa, Apple AirPlay® 2, and HEOS built-in at Crutchfield
Denon Home Sound Bar 550 review: A semblance of a surround sound experience at an appealing price | MusicTech
Denon Home Sound Bar 550 Review - RTINGS.com
Denon HEOS Bar review: Great sound but expensive | Expert Reviews