Denon AVR-684 User Manual

NEW MODEL INFORMATION

Dolby Digital and DTS A/V Receiver

AVR-684

DTS-ES Discrete 6.1 and Dolby Digital EX with Power Amps for 6 Channels

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DENON's Basic Design for High-Quality Sound Reproduction
Power Transformer for High Power Driven

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The chassis that supports the large transformer
has been designed to absorb vibration, and the
transformer is housed inside a highly rigid frame
to secure it more solidly to the chassis. In addition,
a cushioning material has been placed around
the core of the transformer to minimize interference
on the signal and enable more faithful reproduc­tion of the original sound. The AVR-684 inherits
these low-noise design from higher-end models
not to mention the use of short ring.

Twin Drive Rectifier

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DENON's Twin Drive Rectifier design uses two rectifying diodes in parallel
to bring out the maximum potential of the large transformer. Since the
rectifiers recharge the large block capacitors at low impedance, they
are able to supply ample current to reproduce deep basses as well as
sudden bursts of sound from percussion or other musical instruments.

Large Aluminum Extruded Heatsink

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DENON uses large heatsink made of extruded alu­minum. They have been placed in a design that
ensures mostly uniform temperatures throughout
the heatsink so that the output transistors for all
channels can be driven under uniform conditions.
This in turn ensures that all channels respond
with equal performance to the demands of the
audio signals.

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Fully Discrete, Equal Power Six Amplifier Channels, 110 Watts Each

Front 110 W + 110 W (6 ohms, 1 kHz, 0.7 % THD)
Center 110 W (6 ohms, 1 kHz, 0.7 % THD)
Surround 110 W + 110 W (6 ohms, 1 kHz, 0.7 % THD)
Surround Back

For optimum Dolby Digital and DTS reproduction, the AVR-684 features
high quality, wideband audio amplification, providing 110 watts power
output for each of the six main channels.
A large capacity power supply includes a high current power transformer
along with discrete power output devices on all six amplifier channels for
highest dynamic range and superb reproduction clarity.

110 W (6 ohms, 1 kHz, 0.7 % THD)

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32 bit High Quality DSP

A-high -quality 32-bit DSP “MELODY 32” from Analog Devices has been
used in the DSP processor, placing the AVR-684 at a higher rank than
other models of this class in its ability to accurately decode and reproduce
the superior quality of surround sources.

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24 bit, 96 kHz High Resolution D/A Conversion

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Wide-Range Play Capability for DVD-Audio and Super Audio CD

The power amp circuits of the AVR-684 have been meticulously designed to
reproduce the exceptionally high sound quality with wide frequency
response from 10 Hz to 100 kHz.

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Cinema Equalizer

The sound from movie sources recorded in Dolby Digital, DTS or other
formats emphasizes high-frequency range due to a theater’s front
speakers being placed behind the movie screen. If this sound is repro­duced in the home theater without correction, the high-frequency range
is too strong. The AVR-684 features a Cinema Equalizer to correct
these high-frequency components so that the sound is clearer and
easier to listen to. (For Dolby Digital, Dolby Pro Logic II, Dolby Digital
EX and DTS surround modes)

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Personal Memory Plus, for Easy Operation

The AVR-684 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.

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Acclaimed Customization Feature

As with all of DENON’s high-grade A/V receiver, the AVR-684 lets you
adjust delay times and other parameters so that you can customize the
performance of the AVR-684 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. These customized
features are then stored, for each source input and surround mode, in
Personal Memory Plus so constant readjustments are not required.

NEW MODEL INFORMATION

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Multi-Function Preset Memory Remote Controller with Glo-keys

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.

* Remote control codes cannot be used with the products of other

manufacturers and some DENON products.

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DTS-ES (Discrete 6.1 / Matrix 6.1) and DTS NEO:6 Decoder

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Dolby Digital, Dolby Pro Logic II and Dolby Digital EX Decoder

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6 Channel Stereo Mode

DENON's popular 6 Channel Stereo mode transforms your favorite
2-channel sources such as CD, tape, stereo radio and stereo video
sources into exciting surround sound, free of delay effects and unnatural
artifacts, from all six speakers. This 6 Channel Stereo mode was originally
developed by DENON to enhance music lovers' enjoyment of home
theater ambience.

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Virtual Surround Mode

Surround yourself with sensational 3D soundfield envelopment using just
one pair of speakers. The AVR-684's Virtual Surround mode provides a
dramatic psychoacoustic surround sound effect, using two speakers
with all sources.

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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 / 6 Channel Stereo 5. Video Game

2. Virtual Surround 6. Matrix

3. Rock Arena 7. Mono Movie

4. Jazz Club

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Adjustable Cross-Over Switching

The AVR-684 supports subwoofer cross-over switching with a choice of
4 cross-over frequencies: 80, 100, 120 and 150. This lets you more
accurately match the performance characteristics of the subwoofer to
the main speaker system.

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Digital Optical Output

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Front Panel Inputs (with Optical Input)

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Front A/B Speaker Terminals

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High-grade Speaker Terminals (except speakers B)

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Frequency Synthesis Tuning

• 40-Station AM/FM Random Preset Memory Tuning

• Auto Preset Memory

AVR-684

Specifications

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Input/Output Terminals For Every A/V System

Audio Inputs

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8 Analog Inputs.................................... CD, TUNER, DVD/VDP, TV/DBS, AUX

6 Analog EXT. Input ............................ FRONT L/R, CENTER,

3 Digital (Optical) Input ........................ OPTICAL X 3

1 Digital (Coaxial) Input ....................... COAXIAL X 1

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Audio Outputs

1 Analog PRE OUT Terminals............. SUBWOOFER

2 Analog REC OUT Terminals

1 Digital (Optical) Output ..................... Optical X 1

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Video Inputs

4 Composite Inputs.............................. DVD/VDP, TV/DBS, VCR, V.AUX(FRONT)

3 S-Video Inputs ...................................... DVD/VDP, TV/DBS, VCR

2 Component Inputs ................................ DVD/VDP, TV/DBS

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Video Outputs

2 Composite Outputs........................... VCR, MONITOR

2 S-Video Outputs ............................... VCR, MONITOR

1 Component Output ........................... MONITOR

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Power Amplifier Section

Rated output *THD figures are power amp stage values.

Front.......................................... 75 W + 75 W (8 ohms, 20 Hz - 20 kHz, 0.08 % THD)

Center ....................................... 75 W (8 ohms, 20 Hz - 20 kHz, 0.08 % THD)

Surround................................... 75 W + 75 W (8 ohms, 20 Hz - 20 kHz, 0.08 % THD)

Surround Back ........................ 75 W (8 ohms, 20 Hz - 20 kHz, 0.08 % THD)

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Preamplifier Section

Input sensitivity/Impedance

CD, DVD/VDP, TV/DBS, VCR, CDR/TAPE, AUX

V.AUX(FRONT)................. 200 mV/47 kohms

Output level/Load impedance

SUBWOOFER................... 1.2 V/10 kohms

CDR/TAPE, VCR .............. 200 mV/47 kohms

Frequency response.............. 10 Hz - 100 kHz (+1, -3 dB) (Tone Defeat On)

Signal-to-noise ratio............... 98 dB (IHF-A weighted) (Tone Defeat On)

Tone control........................... Treble: ±12 dB at 10 kHz

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FM Section

Tuning frequency range......... 87.5 - 107.9 MHz

Usable sensitivity................... 1.0 µV (11.2 dBf)

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AM Section

Tuning frequency range......... 520 - 1710 kHz

Usable sensitivity................... 18 µV

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General

Power supply ......................... AC 120 V, 60 Hz

Power consumption ............... 4.0 A

Dimensions............................ 434 (W) x 147 (H) x 417 (D) mm

Weight.................................... 10.8 kg, 23.8 lbs

VCR, CDR/TAPE, V.AUX(FRONT)

SURROUND L/R, SUBWOOFER

.............. VCR, CDR/TAPE

110 W + 110 W (6 ohms, 1 kHz, 0.7 % THD)

110 W (6 ohms, 1 kHz, 0.7 % THD)

110 W + 110 W (6 ohms, 1 kHz, 0.7 % THD)

110 W (6 ohms, 1 kHz, 0.7 % THD)

Bass: ±12 dB at 100 Hz

17.1” (W) x 5.8” (H) x 1.4 “(D)

Front panel with terminal cover.

*Design and specifications are subject to change without notice.
*”Dolby”, “Dolby Digital”, “Dolby Digital EX”, “Pro Logic II”, and the double-D device are registered trademarks of Dolby Laboratories Licensing Corporation.
*DTS is registered trademarks of DTS Technology.

DENON ELECTRONICS (USA) LLC. DENON, LTD.

19 CHAPIN ROAD, P.O. BOX 867, PINE BROOK, NJ 07058-9777 USA 3-16-11, YUSHIMA, BUNKYO-KU, TOKYO 113-0034, JAPAN
TEL: [phone] www.usa.denon.com

DENON CANADA INC.

505 APPLE CREEK BLVD. UNIT 5 MARKHAM, ONTARIO L3R 5B1 CANADA
TEL: [phone] www.denon.ca

13351003 A