Denon AVR-686 - Manual

AVR-686
A/V Receiver
DTS-ES Discrete 6.1 and Dolby Digital EX with Power Amps for 7 Channels
■ High-Quality Surround Sound Reproduction
• High Resolution 32bit Floating Point DSP
• 96 kHz Processing Circuit
• 3 Sets of Component Video Inputs
• 3 Sets of S-Video Switching
■ Auto Setup with Microphone
The AVR-686 is equipped with an Auto Setup function, to
achieve the most ideal sound field for your room. With the
microphone placed at your listening position, the powerful
32bit floating point DSP automatically and accurately
analyses, adjusts and sets the speaker configurations of
your system.
■ Fully Discrete, Equal Power 7 Amplifier Channels, 75 Watts Each
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 + 75 W (8 ohms, 20 Hz - 20 kHz, 0.08 % THD)
For optimum Dolby Digital and DTS reproduction, the AVR-686 features high quality, wide-
band audio amplification, providing 75 watts power output for each of the 7 main
channels. A large capacity power supply includes a high current power transformer
along with discrete power output devices on all 7 amplifier channels for highest dynam-
ic range and superb reproduction clarity.
■ DENON's Basic Design for High-Quality Sound Reproduction
• Power Transformer for High Power Driven
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-686 inherits these
low-noise design from higher-end models not to mention the use of short ring.
• Twin Drive Rectifier
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
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 uni-
form conditions. This in turn ensures that all channels
respond with equal performance to the demands of the
audio signals.
■ Wide-Range Play Capability for DVD-Audio and Super Audio CD
The power amp circuits of the AVR-686 have been meticulously designed to reproduce
the exceptionally high sound quality with wide frequency response from 10 Hz to 100 kHz.
■ Dual Channel Surround Back Power Amp for 7.1 Surround
The AVR-686 is equipped with a total of 7 power amps including 2 for the Surround
Back channel speaker to give you more clearly defined sound localization at the rear
for 6.1-channel surround sources such as DTS-ES Discrete 6.1, DTS-ES Matrix 6.1,
Dolby Digital EX, and DTS-ES NEO:6.
■ Assignable surround back (L/R) amplifiers for front (L/R) channel bi-amping,
or for Multi-zone playback
Amplifiers initially reserved for Surround back (L/R) channels can be assigned to bi-
wire Front (L/R) channels to improve playback quality in the front for enhanced listen-
ing enjoyment. Or the amplifiers can be assigned to Zone 2 speakers (with multi-
source), in addition to PREOUT for Zone 2.
■ Cinema Equalizer
The sound from movie sources recorded in Dolby Digital, DTS or other formats empha-
sizes 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-686 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)
■ Personal Memory Plus, for Easy Operation
The AVR-686 includes the Personal Memory Plus function that automatically remem-
bers the surround mode you last used for each program source, so that you do not
need to select the mode again for that program.
■ Acclaimed Customization Feature
As with all of DENON’s high-grade A/V receiver, the AVR-686 lets you adjust delay
times and other parameters so that you can customize the performance of the AVR-
686 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.
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