Prime Day is the time to trawl Amazon for the best in all things, including high-quality speakers at bargain prices. For much less than usual, you can add a new lynchpin to your soundsystem. That ...

The KEF XIO packs a 5.1.2 punch—five main channels, one subwoofer channel, and two overhead channels—all fired up by a dozen Class D amps crammed into a single sleek soundbar. It’s basically a home ...