Surround-sound receivers have become increasingly less mainstream. Hardcore home theater DIYers tend to prefer separate AV processors and multichannel amplifiers, while the more casual cinephile who’s starting from scratch is probably best served by a high-performance soundbar. But if you already own home theater speakers that you love, or if you’re looking for more customization and installation options than even a top-tier soundbar can offer, an AV receiver represents a great middle ground.For most people, the Denon AVR-X1800H offers everything necessary — now and for the foreseeable future — to enjoy a premium movie, video game, TV, or music experience with full immersive-sound capabilities. All you have to do is add some speakers and subwoofers.