I bought these to use with two Sonos Play:1 speakers and they worked great. They're a bit small, but they do the job when your speakers are in a low-traffic area. Mine are on the windowsill behind my couch, serving as the rear left and right surround speakers, so I have to angle them. I would think twice about putting my speakers on my desk or somewhere they could be constantly knocked over. The coasters are just little metal wedges and feel a bit overpriced, but they look a lot better than the rubber alternatives.
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