Sonos One SL review: Great sound from a versatile wireless speaker
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Brennan B3 (2TB Black) Hifi - Hard disk CD ripper & recorder, storage and player with Bluetooth, Sonos Compatible, Internet Radio, Stereo Power amplifier, NAS, Wav, Lossless (FLAC) and MP3.: Amazon.co.uk: Electronics
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Add Aux to Sonos Using Raspberry Pi : 26 Steps (with Pictures) - Instructables