Dolby Atmos is the most immersive version of surround sound you can get at home. Though it took some time to catch on, the format is now everywhere, from movie theaters to Ultra HD Blu-ray discs ...

To the untrained eye, an AV receiver may just look like a big black box that a bunch of TV and speaker wires run in and out of. Far more than a junction box for your go-to components like ...