Computerworld - https://www.computerworld.com/article/3246453/mobile/sonos-play-1-is-discounted-62-right-now-on-amazon.html#tk.rss_all
Sonos has designed the Play:1 wireless speaker to look and sound great in any space, whether it’s a kitchen counter or the bookshelf in your bedroom. It contains two Class D amplifiers, one 3.5″ mid–woofer for mid–range frequencies and deep bass, and one tweeter for crisp and accurate high–frequency response. Pair multiple speakers together in the same room for a more immersive experience, or add speakers in different rooms. When connected to an Amazon Alexa-enabled device, you can control the Sonos experience hands-free using Alexa voice commands.