Denon avca1d schematic

AVC-A1D

Dolby Digital / DTS / THX Certified A/V Surround Amplifier

■ New DDSC-Digital Circuit

DENON’s original DDSC (Dynamic Discrete Surround
Circuit) -Digital audio technology represents the integration
of all blocks of a surround circuit into a single, high-perfor­mance IC to reproduce digital surround sources at higher
levels of sonic quality. The New DDSC-Digital audio circuit
embodies further performance improvements over the origi­nal DDSC-Digital circuit, and reproduces superior-quality
sound not only from surround sources but pure audio
sources as well.

The high sound quality of New DDSC-Digital is due in
part to the high-grade signal processing of the 24-bit, 96 kHz
Digital Interface Receiver (DIR). The AVC-A1D not only
allows digital signals input from DVD and other advanced
media to pass directly to the DIR, it also processes them
while preserving their integrity so that even the most delicate
nuances of the music, reflecting the emotions of the artists,
are passed unfettered to the digital signal processor (DSP).

The First A/V Amplifier To Master Movies and Music

DENON, the developer of the world’s first A/V components that combined the magic of Dolby Digital with Lucasfilm’s THX

5.1 technology, now elevates the performance standard with the new AVC-A1D A/V surround amplifier. Packed with virtually
every desirable feature for outstanding home theater and music surround sound enjoyment, the AVC-A1D is the only A/V
component that provides optimized surround sound for both movie soundtracks as well as discrete multi-channel music sur­round. Powered by the newest high speed dual 32-bit DSP processors, the AVC-A1D includes Dolby Digital as well as dts
decoding, along with Lucasfilm THX 5.1 post-processing, entirely in digital domain - the world’s first A/V surround amplifier
with this capability.

The AVC-A1D is engineered for the future, with eight channel (7.1) inputs for the future multi-channel formats, and 8 channel
pre-amp outputs for a clear system upgrade path. Able to accommodate virtually any present or future source, the AVC-A1D
provides component video switching along with “S” and composite video switching, and nine digital inputs (including one for
RF laser disc). Premium 24-bit, 96 kHz DACs on all six channels with DENON’s exclusive 24-bit Alpha processing for the
main (L/R channels), and a THX Ultra-certified five channel power amp section with an output of 140 watts per channel, all
add up to the best-sounding A/V component available today.

AC-3 RF Input

Analog Input

Digital Input

96kH / 24-bit

96kH / 24-bit

L
R

Front

L

R

Surround

Center

Subwoofer

DF 1

AL 24

Processing

Digital
Interface
Receiver

DF 2

96 kHz/

24-bit

DF 3

96 kHz/

24-bit

32-bit

floating

point

32-bit

floating

point

DF 4

96 kHz/

24-bit

Demodulator

A/D Converter

Master
Volume
Control

DAC 1

DSP 1 DSP 2

DAC 2

DAC 3

96kH / 24-bit

96kH / 24-bit

DAC 4

DAC 5

DAC 6

Dolby

Digital

Pro-Logic

Decoder

DTS

Decoder

THX

Processor

Surround

Simulator

AC-3 RF Input

Digital Input

Analog Input

DSP 1 DSP 2

96kHz / 24-bit

32-bit

floating

point

32-bit

floating

point

L

R

Front

L

R

Surround

Center

Subwoofer

Dynamic Discrete Surround Circuit-Digital Block Diagram

NEW MODEL INFORMATION

*Black version is available.

96kHz / 24-bit

96kHz / 24-bit

96kHz / 24-bit

■ Two 32-bit Floating Point DSPs

The AVC-A1D is equipped with two DSPs that employ
newly-developed 32-bit floating point technology to faithful­ly process the delicate details of the original sound record­ing. One of the DSPs is dedicated for use with the Dolby
Digital and dts decoder and the other is used for THX and
surround sound reproduction. The 32-bit digital signals that
are decoded by these two DSPs are then converted at high
resolution into 24-bit signals and passed to the digital filter.

■ 24-bit, 96 kHz D/A Converters for All Channels

The same Multiple 24-bit D/A Converter that is used in
the DVD-5000 has been employed for all channels in the
AVC-A1D—a dedicated converter for each of the five Front,
Center, and Surround channels, plus a 24-bit D/A converter
for the subwoofer—to ensure smooth D/A conversion at high
resolution of 24 bits and 96 kHz for all channels.

■ AL24 Processing for Front Channels

The AVC-A1D includes AL24 Processing, the same
highly-acclaimed analog waveform reproduction technology
that is used in the DVD-5000. AL24 Processing realistically
reproduces subtle background sounds that heighten the
emotional drama of movies, or the delicate residual sounds
that are enjoyed during live musical performances.

■ Discrete Amplifiers with Uniform Power and

Response to All Channels

The wealth of DENON’s technological know-how in pure
audio amplifiers has been tapped to build a powerful, high­quality amplifier system for the reproduction of Dolby
Digital. Each channel is configured with its own discrete
power amplifier, all of which deliver equal power and per­form with uniform response. The AVC-A1D’s power unit
incorporates a large transformer and other vital parts that
have been developed for DENON’s high-end pure audio
components. The various blocks of the AVC-A1D, such as
the analog section, digital section, video section and micro­processor section, have all been isolated from each other
in order to thoroughly suppress any mutual interference
caused by noise. This design ensures that the extremely
high level of sound quality that is the hallmark of current
and next-generation media remains pure and transparent
from input to output.

■ Built-in DTS Decoder

The AVC-A1D also has a dts Digital Surround decoder
to faithfully reproduce the original sound that was recorded
on sources via a Digital Surround encoder. This features
allows home theater buffs to enjoy at home the same sort
of dynamic power that one can experience in the sound
space of dts-equipped movie theaters. Since the high per­formance of 24-bit, 96 kHz D/A converters delivers the full
effects of dts Digital Surround to all channels, the sonic
results are completely satisfying.

■ THX Ultra: Advanced Surround Taken to the Hilt

The AVC-A1D is equipped with a THX Processor sup­porting THX 5.1, an advanced surround technology that
recreates the sound space created at a dubbing studio for
producing the sound tracks of movies. When the digital sig­nal that was processed in the Dolby Digital decoder and the
dts decoder is passed on to the Re-Equalization Circuit and
the Timbre Matching Circuit, the AVC-A1D is capable of
reproducing an ideal sound space for the enjoyment of
multi-dimensional sound.

The AVC-A1D has also cleared approximately 300
requirements to meet the standards of THX Ultra that
Lucasfilm Ltd., the developer of THX technologies, has
established governing audio quality and the operating ease
of other components in the A/V system.

■ A Rich Selection of Surround Modes

Besides the red-hot Dolby Digital + THX 5.1 combination
plus the dts + THX 5.1 alternative being offered for the first
time in the world in a single A/V surround amplifier, the
AVC-A1D provides a wealth of playback options as well.

5-Monaural Construction Power Block