The Denon AVR 391 does not have a lot of functionalities, but this Denon receiver is the advantageous Entry level AV receiver on the market and the first one from Denon in 2010 model line-up and I have to say that this beast is crowded with all the basic feature, an entry-level AVR must have. Not all of us require an 8.1 channel Surround Sound system, but this 5.1 channel Surround Sound system can be prolonged to include two addition pre outs for Surround Back channels at an astonishing price point.
It's equipped with 1080p compatible HDMI 1.4a Repeating technology (4 in, 1 out), with 3D pass through (all formats) allowing delivery of both audio and video to your HDTV with a single HDMI cable.
Audio return channel (ARC) is one of the new features supported by HDMI 1.4, it's a worthwhile feature that allows TVs to send audio back to an AV receiver over the same HDMI cable that is transmiting video from the receiver to the HDTV. That's convenient if you're using your HDTV's over-the-air tuner or perhaps one of its built-in streaming media services (such as Netflix or Amazon VOD), and want to listen with your surround sound system. It's not an advanced feature--it's only saving you the hassle of making an extra connection from the TV's digital audio output--and it only works with new HDTVs that support ARC, but it's still a nice bonus to simplify your home theater arrangement.
It has a few composite connections for audio and video. It also has a few digital audio connections (coaxial and optical).It decodes pretty much all of the current HD audio codec's.
Blu-ray movies look and sound fantastic through this receiver. I have my PS3 and Xbox360 hooked up to it and my games sound incredible. I even have my Wii's audio passing through this receiver and it sounds good too. It doesn't have on screen menus, but configuring the speakers is pretty accessible using the unit's display (it all has to be done manually). The remote isn't great, but it's not bad either. It's fairly instinctive and easy to read. It's not backlit or anything like that.
You can also connect and control your iPod/touch or iPhone using the front panel controls for ipod connectivity and Dolby Pro Logic IIx, which provides Music, Cinema and Game modes, all of them make this Denon AVR the best out there in its line. When connecting iPod and other MP3 players, the AVR-391 features Denon's exclusive Compressed Audio Restorer to augment sound quality and dynamics.
Among the integral features, the powerful 5 channel x 110W (6-ohms, 1kHz, 5 x 75W 8-ohms, 20 - 20kHz) amplifier section delivers detail and dynamics to music and movie soundtracks HDMI connectivity supports the latest generation surround sound formats available on Blu-ray disc, including Dolby TrueHD and DD+, dts-HD and dts-HR.
Highly recommended for those who just need an entry-level, affordable AVR, but also don't want to cop out on any of these feature listed above.