2.1 vs 3.1 Soundbar: Which Is Better? - Audioviser
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What's the Difference Between a 2.1 and 3.1 Soundbar?
LG S65Q Powered 3.1-channel sound bar and wireless subwoofer system with Bluetooth®, Meridian Technology, and DTS® Virtual:X™ at Crutchfield
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Hisense 3.1-Channel Soundbar with Wireless Subwoofer Black HS312 | eBay
Klipsch Cinema 600 3.1 Bluetooth Sound Bar with 10" Wireless Subwoofer | World Wide Stereo
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