5-Channel Amplifier: The Denon AVR-391 features a 5-channel,
equal power, discrete amplifier; each channel is rated at 75 watts RMS. Stereo
preamp outputs for the surround back channels allow you to add an amplifier to
take advantage of 6.1 and 7.1 channel formats.
Minimum Signal Path Design: The simple & straight design
concept has been thoroughly implemented in the signal paths to contribute to clean
audio and video playback. Signal paths are as short as possible to keep signal
degradation in the audio and video circuitry to a minimum.
Direct Mechanical Ground Construction: Vibration-resistant
construction has been used to suppress the adverse influences of vibration on
sound quality. The power transformers, a source of vibration, have been securely
mounted on the high rigid bottom chassis. Direct mounting of the feet to
the radiator in near proximity to each other serves to suppress mutual vibration
with the power transformers and other sources of vibration.
Surround Modes: This receiver incorporates a wide variety of
surround modes to bring you maximum enjoyment from your audio and video software.
The unit can be set to store the most recently selected surround mode for each
input, so it is automatically activated each time the particular input is chosen.
The surround modes include:
- Dolby Digital: Dolby Digital is a 5.1 multi-channel
digital surround format.
- Dolby Digital EX: Dolby Digital EX is a 6.1
multi-channel digital surround format.
- Dolby Digital Plus: Dolby Digital Plus was developed as
an extension of Dolby Digital; the coding technology supports 7.1 discrete
channels and has a higher bit rate.
- Dolby TrueHD: Dolby TrueHD is a lossless coding
technology that supports up to 8 channels of multi-channel surround sound
for the next generation optical discs. The reproduced sound is true to the
original source bit-for-bit.
- DTS Digital Surround: DTS Digital
Surround is a 5.1 multi-channel digital surround sound
format used for both commercial/theatrical and consumer
- DTS-HD High Resolution: DTS-HD High Resolution Audio is
an improved version of the conventional DTS, DTS-ES and DTS 96/24 signal
formats that is compatible with sampling frequencies of 48 or 96 kHz and up
to 7.1-channels of discrete digital sound. High data bit rate performance
provides high quality sound.
- DTS-HD Master Audio: DTS-HD Master Audio is a lossless
audio format compatible with up to 96 kHz and up to 7.1-channels. The
lossless audio coding technology faithfully reproduces the sound of the
- DTS-ES Extended Surround: DTS-ES features
two 6.1 multi-channel formats:
- DTS-ES Discrete 6.1: DTS-ES
Discrete 6.1-channel is a 6.1-channel discrete
digital audio format adding a surround back channel
to the DTS digital surround sound.
- DTS-ES Matrix 6.1: DTS-ES
Matrix 6.1-channel is a discrete 5.1 channel digital
audio format inserting a surround back channel to
the DTS surround sound through matrix encoding.
- DTS Express: DTS Express is an audio format
supporting low bit rates (maximum 5.1-channels, 24 to 256 kbps)
- DTS 96/24: DTS 96/24 is a
digital audio format enabling high sound quality playback in 5.1-channels
with a sampling frequency of 96 kHz and 24 bit quantization of DVD-video.
- DTS Neo:6 Surround: DTS
Neo:6 is a matrix decoding technology for achieving 6.1-channel surround
playback with 2-channel sources. You can choose from two DTS Neo: 6 Surround
formats - Neo: 6 Cinema and Neo: 6 Music.
- Dolby Pro Logic: Center and mono surround information is matrixed
into two stereo channels. When reproduced, audio is decoded and output in 4
channel surround sound.
- Dolby Pro Logic II: Dolby Pro Logic II technology processes any high
quality stereo (two-channel) movie and music audio into five playback
channels of full-bandwidth surround sound. A matrix surround decoding
technology, Dolby Pro Logic II detects the directional cues that occur
naturally in stereo content and uses these elements to create a five-channel
surround sound playback experience. You can choose from Cinema, Music, or Game
formats. You can also choose Dolby Pro
Logic (the earlier 4-channel mode).
- Dolby Pro Logic IIx: Pro Logic IIx expands any existing
stereo- or 5.1-channel audio for a 6.1- or 7.1- channel playback, creating a
seamless, natural surround soundfield that immerses you in the entertainment
experience. You can choose from the following Dolby Pro Logic IIx formats -
Cinema, Music, or Game.
- Virtual: Enjoy surround effects
using only the front speakers or headphones.
- Multi Channel Stereo: Stereo sound is played from
- Stereo: This
is the mode for playing in 2-channel stereo; bass and treble can be adjusted
and sound is output
from the front left and right speakers, along with a connected subwoofer.
- Direct: In this mode the audio signal is played in its
original form, without any surround or tone processing.
Surround Parameters: You can adjust the following surround
- Dynamic Range Compression (DRC): Motion
picture soundtracks have tremendous dynamic range (the contrast
between very soft and very loud sounds). For listening late at
night, or whenever the maximum sound level is lower than usual,
Compressing the dynamic range allows you to hear all of the
sounds in the soundtrack with reduced dynamic range. DRC works when playing
program sources recorded in Dolby TrueHD.
- D.Comp: Like DRC, but used with Dolby
Digital and DTS sources.
- LFE: This setting adjusts
the low-frequency effects level (LFE); adjust from -10 to 0
- Center Width: This function assigns the center channel signal to
the front left and right channels for wider sound; select from 0 to 7. This
function only works in the Dolby Pro Logic II Music and PL IIx Music modes.
- Center Image: This function assigns a center channel signal
to the front left and right channels for wider sound; adjust from 0.0 to
1.0. This function only works in the DTS Neo:6 Music mode.
- Panorama: This feature assigns front
left and right signals to surround channels for wider sound,
you can turn this feature On or Off. This function only works
in the Dolby Pro Logic II Music and PL IIx Music modes.
- Dimension: This settings
shifts the sound image to the front or rear to adjust
playback balance; select from 0 to 6. This function only works in the Dolby
Pro Logic II Music and PL IIx Music modes.
- AFDM: Detects the source's surround back channel signal and
sets the optimum surround mode automatically.
- SB CH Out: This setting selects the playback mode for
the surround back (preamp) channels; there are separate settings for multi-channel
and 2-channel sources.
- Subwoofer: Turn the sub on/off.
Speaker Setup: When setting up the speaker system make the
- Speaker Configuration: large or small for the front speakers;
large, small, or none for the center and surround speakers and the surround
back preamp outputs; yes or no for the subwoofer
- Subwoofer Mode: LFE channel only or LFE+Main bass information is
reproduced by the subwoofer
- Low-pass Crossover: 80, 90, 100, 110, 120, 150, 200, or 250 Hz
- Distance: set the distance from the listening position to each
speaker individually; 0-60' in 0.1' increments
- Channel Level: set the output volume of each channel
individually; -12 to +12dB
- High-pass Crossover: set the crossover points for each set of
speakers configured as small; 40, 60, 80, 90, 100, 110, 120, 150, 200, or
Quick Select: The front panel and main remote both have
three Quick Select buttons. Each button can be programmed with a specific input
source, volume, surround mode, and video select settings for easy recall.
Source Level: This function adjusts the playback level of
the currently selected input source's audio input. Use this feature if there are
differences in the input volume levels between different sources. You can correct
the playback level of the audio input from -12 to +12dB.
Restorer: This function restores compressed audio signals to
pre-compression form, correcting the sense of bass and treble volume to obtain a
richer sounding playback.
Audio Delay: This feature compensates for the timing shift
between the audio and video signals; adjust from 0-200ms.
Volume Setting: You can set a maximum volume level of 0, -10,
or -20 dB to limit the receiver's maximum volume output. You can also specify a
turn-on volume, from -80 to +18dB or Last (whatever the volume setting when the
receiver was turned off).
Muting Level Adjustment: You can set the amount of attenuation
for the audio muting circuit; -40dB or -20dB below current volume, or full mute
(sound turned off entirely).
Assignable Digital Inputs: The AVR-391 features an
optical digital (Toslink) input and a coaxial digital input. Each input
can be assigned to any of the input sources except
Speaker Terminals: The receiver's front speaker
terminals are binding posts. They are not 5-way binding posts because a
plastic collar prevents their use with spade lugs and they are positioned
too far apart to be used with dual banana plugs. The center and surround
channels have spring terminals and will accept pin connectors or bare wire up to
Personal Memory Plus: For each input, the receiver automatically
memorizes the settings for input mode, surround mode, HDMI output mode, audio delay,
etc. When the input source is switched, the settings last used for that source are
automatically recalled. The surround parameters, tone control settings, and playback
levels for the different output channels are memorized for each surround mode.
Sleep Timer: This function allows you to automatically set the power
to standby after a predetermined amount of time has passed; set the sleep
timer up to 120 minutes in 10 minute increments.
HDMI ver. 1.4a: This unit has four HDMI version 1.4a inputs
and one HDMI version 1.4a output. They support HDCP copyright protection and are
compatible with 3D signals, Deep Color, and xvYCC technology.
3D: The AVR-391 will pass the 3D signal when connected
to a 3D source (3D Blu-ray player, 3D cable box, etc) and a 3D TV.
Video Select Function: You can switch the video input source
on the receiver while listening to a different audio signal.
Dimmer: The receiver features 4
display settings; Bright, Dim, Dark and Off.
iPod Compatibility: Using an optional iPod dock
(ASD-11R, ASD-3N, ASD-51N, orASD-51W),
you can integrate most iPods having a dock connector with the AVR-391. Song titles and
elapsed time appear on the receiver's display panel; song titles, artist name, album
title, album art, and elapsed time appear on a TV monitor connected to the AVR-391 via
the component video output (ASD-3N, ASD-51N, and ASD-51W only; no data is transferred
to the TV monitor through the HDMI output or when using the ASD-11R). The iPod can be
controlled using the receiver's remote or the controls on the iPod. Video and still
photos stored on the iPod can also be displayed on the TV monitor.