What's the Difference Between a 2.1 and 5.1 Soundbar?
2.1 vs 5.1 vs 7.1 – Which is Best for You? - Enclave Audio Technologies, LLC
What's the Difference Between a 2.1 and 5.1 Soundbar?
Amazon.com: Bobtot Home Theater Systems Surround Sound Speakers - 800 Watts 6.5inch Subwoofer 5.1/2.1 Channel Wired Home Audio Stereo System with HDMI ARC Optical Bluetooth Input for TV : Electronics
Amazon.com: Bobtot Home Theater Systems Surround Sound Speakers - 1200 Watts 10 inch Subwoofer 5.1/2.1 Channel Home Audio Stereo System with HDMI ARC Optical Bluetooth Input for 4K TV Ultra HD AV
2.1 vs 5.1 vs 7.1 – Which is Best for You? - Enclave Audio Technologies, LLC
Stereo (2.1) to 5.1 surround upmix: Foobar2000
2.0, 5.1 and 7.2 Surround Sound: Pick the Best Layout | Home Cinema Guide