Excerpt: When I review speakers, I have dozens of major and minor brands to choose from. When I review audio/video receivers, the same names come up time and again. There just aren’t that many of them. You might think reviewing the same AVR brands repeatedly would leave me jaded. But it doesn’t. Every one of those heavy black boxes is a new quest. Every manufacturer has to prove itself all over again—and prove it to me, someone with a frame of reference that goes back decades.