The Denon AVR-3805 is a home theater receiver that was released by Denon in 2004. It is part of the AVR-x805 series and is designed to provide high-quality audio and video performance. The receiver features Dolby Digital EX and DTS-ES decoding, along with support for 7.1 channel audio. It offers a wide range of connectivity options including HDMI, component video, and multiple audio inputs. The AVR-3805 also has a built-in AM/FM tuner and can be controlled remotely. It is known for its user-friendly interface and versatility in home theater setups.