The Denon AVR-4308 is a high-end audio/video receiver produced by Denon. It is part of the AVR series and was released in 2007. The receiver offers multi-zone playback, THX Ultra2 certification, and supports various audio formats including Dolby TrueHD and DTS-HD Master Audio. It also features HDMI connectivity, automatic room EQ calibration, and networking capabilities for streaming media. The AVR-4308 is known for its powerful performance and advanced audio/video processing capabilities.