Denon AVR-681 User manual

The AVR-681 A/V receiver lets you enjoy home theater entertainment through a wealth of easy-to-use functions and
superior sound quality. It provides five high-powered channels of 90 watts each and of course supports Dolby Digital and
DTS, to give you the scintillating experience of cinematic surround sound in your own home. Even if you have only two
speakers, one for each stereo channel, the AVR-681 includes a Virtual Surround mode that still lets you feel wrapped up in
sound as you would in a real theater.
Bringing the Excitement of Home Theater Closer to Your Home
■Dolby Digital and DTS Decoders
Equipped with both Dolby Digital and DTS 5.1 channel decoding,
the AVR-681 provides thrilling surround sound with the thousands of
Dolby Digital and DTS encoded DVDs, as well as the growing library of
DTS 5.1 channel music recordings available on CD.
■Fully Discrete, Equal Power Five Amplifier Channels, 90 Watts Each
Front 90 W + 90 W (6 ohms, 1 kHz, 0.7 % THD)
Center 90 W (6 ohms, 1 kHz, 0.7 % THD)
Surround 90 W + 90 W (6 ohms, 1 kHz, 0.7 % THD)
For optimum Dolby Digital and DTS reproduction, the AVR-681 features
high quality, wideband audio amplification, providing 90 watts power
output for each of the five main channels. A large capacity power sup-
ply includes a high current power transformer along with discrete
power output devices on all five amplifier channels for highest dynamic
range and superb reproduction clarity.
■5 Channel Stereo Mode
DENON's exclusive 5 Channel Stereo mode provides superb surround
sound with conventional two channel music and video sources. Hear
exciting surround sound from all five speakers with your favorite two
channel music sources such as CD, tape, stereo radio and stereo video
sources.
■Virtual Surround Mode
Surround yourself with sensational 3D soundfield envelopment
using just one pair of speakers. The AVR-681's Virtual Surround mode
provides a dramatic psychoacoustic surround sound effect, using two
speakers with Dolby Digital 5.1 encoded sources.
■DENON DSP Surround Modes Add Listening Excitement
Put yourself in the middle of your favorite concert hall and music
environments with DENON's DSP acoustic environment simulation
modes. These DSP modes add spacious surround sound enhancements
to your favorite music and video sources, and include these distinctly
different sounding effects:
1. 5 Channel Stereo 5. Video Game
2. Virtual Surround 6. Matrix
3. Rock Arena 7. Mono Movie
4. Jazz Club
■Supports Next Generation High Resolution Formats
Future system upgrade capability is provided with the AVR-681's
6 Channel External Input feature. For next generation high resolution
multi-channel audio formats such as DVD-Audio and SACD, the 6
Channel External Input is equipped with a wideband frequency
response extending to 100 kHz. In addition, the digital inputs support
high resolution 24 bit, 96 kHz stereo PCM soundtracks, available on
selected audiophile DVD music releases.
■"S" and Composite Video Switching
Three sets of composite video (coaxial jack) and three sets of "S"-
video terminals are provided (TV, VCR and DVD inputs), allowing a
full complement of video sources to be switched and routed to the
monitor TV.
■Front A/B Speaker Terminals
Two sets of speaker terminals are provided for the main (left and
right) speakers. This allows the use of a second pair of stereo speakers
in another room in the home.
AVR-681
Dolby Digital and DTS A/V Receiver
NEW MODEL INFORMATION

■Versatile Input & Output Terminals
For maximum system flexibility, the AVR-681 is provided with an
abundance of audio and video input and output terminals. Two assignable
digital inputs, one optical and one coaxial, can be configured according to
your system's component output capabilities. The AVR-681 provides five
sets of analog inputs, along with three sets of video inputs, for total system
connection flexibility.
• Audio Inputs
6 Analog Inputs............................ CD, TUNER, DVD/DVP,
TV/DBS, VCR, MD/TAPE
6 Analog EXT. Input..................... FRONT L/R, CENTER,
SURROUND L/R, SUBWOOFER
1 Digital (Optical) Input ................ OPTICAL X 1
1 Digital (Coaxial) Input................ COAXIAL X 1
• Audio Outputs
1 Analog PRE OUT Terminals..... SUBWOOFER
2 Analog REC OUT Terminals ...... VCR, MD/TAPE
• Video Inputs
3 Composite Inputs...................... DVD/VDP, TV/DBS, VCR
3 S-Video Inputs .......................... DVD/VDP, TV/DBS, VCR
• Video Outputs
2 Composite Outputs................... VCR, MONITOR
2 S-Video Outputs........................ VCR, MONITOR
■Personal Memory Plus, for Easy Operation
The AVR-681 includes the Personal Memory Plus function that
automatically remembers the surround mode you last used for each
program source, so that you do not need to select the mode again for
that program.
■Audiophile Quality Speaker Terminals
In addition to accepting bare wire or pin terminations, the front main
speaker terminals (left, center, and right) can also accept banana-plug
terminals for full compatibility with high grade speaker cables, along
with easy connection capability.
■Multi-Function Preset Memory Remote Controller
The supplied system remote controller features a large selection of
remote control codes to operate other components in your home theater
system, including codes for selected DENON models, along with remote
control codes from other manufacturers. The most frequently used buttons
are laid out separately for TV, VCR and DVD, for maximum ease-of-use.
■Acclaimed Customization Feature
As with all of DENON’s high-grade A/V amplifiers, the AVR-681 lets
you adjust delay times and other parameters so that you can customize
the performance of the AVR-681 to suit your own home theater and
enhance operating ease. The adjustments are easy to make via a dialog
format on the fluorescent display on the front panel.
■Frequency Synthesis Tuning
• 40-Station AM/FM Random Preset Memory Tuning
• Auto Preset Memory
Specifications
■Power Amplifier Section
Rated output *THD figures are power amp stage values.
Front..................................... 90 W + 90 W (6 ohms, 1 kHz, 0.7 % THD)
60 W + 60 W (8 ohms, 20 Hz - 20 kHz, 0.08 % THD)
Center................................... 90 W (6 ohms, 1 kHz, 0.7 % THD)
60 W (8 ohms, 20 Hz - 20 kHz, 0.08 % THD)
Surround............................... 90 W + 90 W (6 ohms, 1 kHz, 0.7 % THD)
60 W + 60 W (8 ohms, 20 Hz - 20 kHz, 0.08 % THD)
■Preamplifier Section
Input sensitivity/Impedance
CD, DVD/VDP, TV/DBS, VCR, MD/TAPE,
FRONT L/R, CENTER, SURROUND L/R,
SUBWOOFER................ 200 mV/47 kohms
Output level/Load Impedance
SUBWOOFER................ 1.2 V/10 kohms
MD/TAPE MONITOR,
VCR................................ 200 mV/47 kohms
Frequency response........... 10 Hz - 100 kHz (+1, -3 dB) (Tone Defeat On)
Signal-to noise ratio............ 98 dB (A-weighting) (Tone Defeat On)
Tone control........................ Treble: ±10 dB at 10 kHz
Bass: ±10 dB at 100 Hz
■FM Section
Tuning frequency range...... 87.5 - 107.9 MHz
Usable sensitivity................ 1.0 µV (11.2 dBf)
■AM Section
Tuning frequency range...... 520 - 1710 kHz
Usable sensitivity................ 18 µV
■General
Power supply...................... AC 120 V, 60 Hz
Power consumption............ 3.7 A
Dimensions......................... 434 (W) x 147 (H) x 417 (D) mm
17.1” (W) x 5.8” (H) x 16.4” (D)
Weight ................................ 9.5 kg, 20.9 lbs
DENON ELECTRONICS. NIPPON COLUMBIA CO., LTD.
DIVISION OF DENON CORPORATION (USA) 14-14, AKASAKA 4-CHOME, MINATO-KU, TOKYO 107-8011, JAPAN
19 CHAPIN ROAD, P.O. BOX 867, PINE BROOK, NJ 07058-9777 USA http://www.denon.co.jp
TEL: [phone] http://www.del.denon.com
DENON CANADA INC.
17 DENISON STREET, MARKHAM ONTARIO, CANADA L3R 1B5
TEL: [phone]
12200500 A Printed in Japan
NEW MODEL INFORMATION
AVR-681
*Design and specifications are subject to change without notice.
*”Dolby”, “Dolby Digital”, “Pro Logic”, and the double-D device are registered trademarks of Dolby Laboratories Licensing Corporation.
*DTS is registered trademarks of DTS Technology.