A wireless speaker showdown: Denon's HEOS vs. Sonos (review) | VentureBeat
Denon HEOS Link Wireless Pre-Amplifier For Multi-Room Audio - Series 2 (New Version), Amazon Alexa Compatibility, Powered Subwoofer Connection, Black with Silver, 2.91 x 6.14 x 5.83
Denon HEOS 1 portable wireless speaker review - The Gadgeteer
HEOS Link deviates from Sonos Connect at New Tech '15 | Darko.Audio