Marantz 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 streaming devices, Blu-ray players, projectors, network music streamers, turntables, and more, an AV receiver is the beating heart of a home theater system. You’ll be hard-pressed to wire up any bookshelf speakers, floor-standing speakers, or subwoofers without one of these bad boys! Shopping for an AV receiver can be quite…