Accuphase DG-48 Brochure
● Fully digital signal processing Voicing Equalizer ● High-speed 40-
bit floating point DSP devices ● Separate digital filters for Voicing
and Equalizer sections ● Wide-format color LCD panel allows direct
writing of response curve with stylus pen ● Freely programmable 20
pattern memory
microphone input
● Real-time spectrum analyzer for music signal and
● Analog and digital inputs/outputs provided as standard
Create your ideal listening environment with a stroke of the pen – Highspeed DSP chips and super advanced digital technology in this third-generation Digital Voicing Equalizer make your dream a reality. Offering both
sound fi eld compensation (Voicing) and sound fi eld creation (Equalizer)
functions, the DG-48 lets you use a stylus pen to directly draw the desired
response curve on its large, wide-format color display panel. Even complex
operations can be accomplished quickly and easily. The standard confi guration includes both analog and digital inputs and outputs.
The DG-48 is a third-generation Digital Voicing
Equalizer featuring extremely sophisticated
digital signal processing technology developed
by Accuphase. In 1997, Accuphase introduced
the fi rst such component, the DG-28, which
revolutionized the concept of the graphic
equalizer and made headlines in the audio
world. This was followed by the DG-38, a
further refi ned product that offered automatic
sound fi eld measurement and compensation.
It was celebrated as an essential addition
to a truly high-quality audio system and
made serious music lovers realize again the
importance of the sound fi eld.
When wishing to reproduce superb program
What is a “Voicing Equalizer”?
This somewhat unusual term was chosen to
symbolize the advanced capabilities of the
DG-48. While this product is a full-fl edged high-
precision graphic equalizer in its own right, it
also incorporates a sophisticated system for
automatic sound fi eld compensation.
It divides the audible frequency range into
distinct bands (voices), and lets the user
choose a target response curve that is then
expressed (voiced) by the unit through
a process of precise measurement and
adjustment steps. The result is full control
over frequency response characteristics at the
listening position.
Through creative use of the capabilities offered
by the DG-48, the scope of sound reproduction
in the home environment can be signifi cantly
enhanced. Get ready to experience a new
dimension of music enjoyment.
sources with optimum fi delity, the characteristics
of the entire reproduction chain, including the
speakers as well as the listening room itself,
have to be taken into consideration, and the
capability for providing adequate compensation
is essential. The DG-48 meets this requirement
with a two-fold approach, by enabling both
sound fi eld compensation (Voicing) and sound
fi eld creation (Equalizer). This is accomplished
using the latest 40-bit fl oating point high-speed
DSP technology, making it possible to handle
all sources including SA- CD entirely in the
digital domain. But power does not have to
mean complexity when using the product. The
newly added Simple Voicing course makes
DG-48 Features
Fully digital Voicing Equalizer with 40-bit fl oating point DSP and high-performance
■
CPU/FPGA for digital signal processing
Two equalizing modules for Sound Field Compensation (VOICING) and
■
Sound Field Creation (EQUALIZER)
Large, wide format (6.2 inches) high-resolution TFT LCD
■
panel with fast refresh rate and excellent color
reproduction characteristics
Glass touch panel and supplied stylus pen
■
● Allows direct drawing of response curve on
screen
● Cursor keypad can be called up for pinpoint
operation
● Control functions by tapping or dragging symbols
displayed on screen
Sound field measurement microphone AM-48
■
included
20 memory slots to store entire patterns including
■
target curve, pre/post-compensation curve,
equalizer curve etc. Data sets can be given a name
and called up or modifi ed at any time.
Balanced and unbalanced analog inputs/outputs
■
Digital inputs/outputs (HS-Link/Coaxial/Optical)
Side panels with elegant persimmons wood fi nish
■
automatic sound field measurement and
adjustment a breeze, while the Custom Voicing
Course provides the user with extensive
control over every aspect. A full complement
of balanced and unbalanced analog inputs and
outputs as well as digital inputs and outputs
including HS-Link connectors ensure that
the DG-48 will fi t perfectly into any system
confi guration.
The high-precision wide-format color display
on the front panel makes using the supplied
stylus pen a pure joy, enabling the user to
create any desired response simply by drawing
on the screen. Commanding this much power
and fl exibility has never been so easy.
Cursor keys and
fl at button
Call up input panel for
character input or editing
Edit window
■DG-48 Block Diagram
HS-Link
Digital
Inputs
Analog
Inputs
Left
Right
Microphone
Input
Remote
Commander
Coaxial
Optical
Unbalanced
Balanced
Unbalanced
Balanced
HS-Link
Decoder
Coaxial
Receiver
Optical
Receiver
A/D
Converter
A/D
Converter
A/D
Converter
Infrared
Receiver
DAI
Decoder
DSP
(Filter Engine)
Voicing
Measurement
Filter
Signal Generator
Equalizer
Analyzer
CPU
Master Controller
Memory
DAI
Encoder
MDS
D/A
Conversion
System
DAC
6
MDS
D/A
Conversion
System
DAC
6
Display
Controller
HS-Link
Encoder
Coaxial
Transmitter
Optical
Transmitter
Low-Pass
Filter
Low-Pass
Filter
Low-Pass
Filter
Low-Pass
Filter
Low-Pass
Filter
Low-Pass
Filter
Unbalanced
Unbalanced
Display
Stylus Pen
HS-Link
Coaxial
Optical
Balanced
Balanced
Digital
Outputs
n High-performance/high-precision
delta-sigma A/D converter and
D/A converter
Left
Analog
Outputs
Right
n High-performance 40-bit
fl oating point DSP chip
n High-speed logic
device for DSD PCM
conversion
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