While it delivers rich three-channel sound when connected to a TV, it also lets you create a true five-channel surround setup pretty much cable-free using a pair of Sonos Play:3 wireless speakers.

WSJ: Upgrade Your Television's Audio With a Soundbar

Some soundbars attempt to simulate surround sound using psychoacoustic trickery, but the sonic upgrade you get by adding two rear-channel speakers to your setup is impossible to beat.

WSJ: Upgrade Your Television's Audio With a Soundbar

The AVR 3700 adds WiFi connectivity, and has 7.2 channels (at 125 watts per channel) for adding a second woofer to your setup.

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