AVR-1509 has 5 Amplifier Channels with 75W Each, Audyssey Dynamic Volume and Dynamic EQ, MultEQ Auto setup and Room EQ, 2 HDMI inputs, Versatile Entertainment Driver, Compressed Audio Restorer is Denon's new audio technology for MP3/WMA/AAC compressed audio formats restores higher frequency sounds, along with rich, deeper bass. High quality Sound and Video.

Music around the home is now easier to realize than ever before. The AVR-1709 features a powerful seven channel amplifier section that can be easily configured for a 7.1 channel surround sound loudspeaker system, or to drive a 5.1 channel surround sound system in the main room, while at the same time able to drive a pair of stereo speakers in another room. Featuring tremendous video signal handling flexibility, the AVR-1709 features three latest specification v1.3a HDMI digital video inputs and one HDMI output that handles HD signals up to the highest 1080p resolution.

Ready for the future, the AVR-1909 is equipped with the latest high resolution surround sound format decoding capabilities, including Dolby TrueHD, Dolby Digital Plus, and DTS-HD Master Audio - the latest high resolution audio formats found on many Blu-ray high definition discs. The powerful seven channel amplifier section can be configured for 7.1 channel surround sound, as well as being able to drive a 5.1 channel system in the main room along with powered stereo speaker outputs for second zone audio.

AVR-2309 has 7 channels with 100 watts per channel, Dolby TrueHD, Dolby Digital Plus, Dolby Digital Surround EX, Dolby Pro Logic IIx decoding, Dolby TrueHD, Dolby Digital Plus, Dolby Digital Surround EX, Dolby Pro Logic IIx decoding, HDMI, Faroudja DCDi video processing and up-conversion up to 1080p, Audyssey MultEQ in-room acoustic correction system, Audyssey Dynamic Volume automatic volume-leveling system, Audyssey Dynamic EQ automatic tonal balance adjustment system, Enhanced On Screen Display with icon-menu system and screen saver.

AVR-2809 has 7 channels with 115 watts per channel, Dolby TrueHD, Dolby Digital Plus, Dolby Digital Surround EX, Dolby Pro Logic IIx decoding, DTS-HD Master Audio, DTS ES 6.1 Discrete, DTS ES 6.1 Matrix, DTS Neo:6 decoding, HDMI, Faroudja DCDi video processing and up-conversion up to 1080p, Audyssey MultEQ XT in-room acoustic correction system, Audyssey Dynamic Volume automatic volume-leveling system, Audyssey Dynamic EQ automatic tonal balance adjustment system, Enhanced On Screen Display with icon-menu system and screen saver.

The Denon AVR-3808A is DNLA certified and has 7 channels with 130 watts per channel. Fully assignable channels for bi-amping , Rear Panel RS-232C and Ethernet ports, XM ready tuning, Second zone tone, mono mix and level control, Expanded HDMI v1.3a ports with Deep Color, xvYCC and SACD support, DENON LINK III, enabling high-speed, high-grade digital signal transmission, Audyssey MultEQ XT & MultEQ Pro calibration installer ready.

The Denon AVR-4308A is World's first Vista certified receiver. It has 7 channels with 140 watts per channel. Wi-Fi and Network capable, HD Radio and XM ready tuning, DDSC-HD digital Dynamic Discrete Surround Circuitry, Pure Direct mode & Advanced AL24 Processing Multi Channel, Dedicated iPod port for optional ASD-1R D-dock, DENON LINK III, enabling high-speed, high-grade digital signal transmission.