You can connect a Chromecast Audio Wi-Fi audio device to virtually any powered speaker. The disc-shaped dongle has both analog and digital outputs. But when you plug one into Grace Digital’s CastDock X2 ($100 at Amazon), Google’s product virtually disappears to become one with the speaker, which is purpose-built for the task.
The CastDock X2’s magnetically attached lid hides a perfectly proportioned dock with captive mini-TOSLink and micro-USB cables for audio and power respectively. With the cover back in place, the Chromecast Audio’s logo—peeking through a G-shaped hole—is the only clue that the receiver is in place.
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https://www.techhive.com/article/3099944/home-audio/grace-digital-castdock-x2-review-a-clever-chromecast-audio-companion.html
