THE GOOD

The Denon HEOS 1 offers a rugged build and decent audio quality in an affordable package. The HEOS app is easy to use and attractive-looking. The addition of the HEOS Go package for $99 offers a lot of flexibility including battery power, splashproofing and Bluetooth.

THE BAD

The HEOS without the Go pack isn’t as compelling. Setup of wireless requires a proprietary cable. The app can behave oddly and the number of services pales in comparison to Sonos. For audiophiles there’s no high-res support.
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https://www.cnet.com/reviews/denon-heos-1-review/