The Denon AVR-1800 is a high-performance home theatre AV receiver that offers advanced audio and video capabilities. It supports 4K Ultra HD video with HDR (High Dynamic Range) compatibility, as well as Dolby Atmos and DTS:X object-based audio formats for an immersive and lifelike cinematic experience. The AVR-1800 has nine amplifier channels, allowing for flexible speaker configurations up to 5.2.2 channels (five full-range speakers, two height channels, and a dedicated .2 subwoofer channel). It also features Denon's advanced Audyssey MultEQ XT32 automatical room acoustics optimization technology for improved audio clarity and accuracy in your listening environment. Additional features include Wi-Fi and Bluetooth connectivity, streaming compatibility with popular music services such as Spotify Connect and Tidal, and support for voice control assistants like Amazon Alexa and Google Assistant.