I first wrote about Mass Fidelity’s Core Bluetooth speaker way back when it was the subject of a highly successful crowdfunding campaign. That campaign raised so much cash that Mass Fidelity quickly put a companion subwoofer on the development fast track. Both speakers have been available for a while, so my reviews of both products are ridiculously overdue.

The good news is that Mass Fidelity delivered on every promise it made for each product. The Core itself produces sound that’s completely out of proportion to its size. Just six inches square and four inches high, the Cube easily filled my 247-square-foot home theater with sound.
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https://www.techhive.com/article/3101807/consumer-electronics/mass-fidelity-core-and-core-sub-review-exceptional-bluetooth-speakers.html