In 1997, Accuphase introduced a product which revolutionized the concept of the graphic equalizer and made headlines in the audio world:
The DG-58 Digital Voicing Equalizer now raises the bar again. It is a 4th generation product that reflects the state of the art of advanced signal processing technology developed by Accuphase. Ease of operation has also been enhanced, with two “Simple Voicing” courses for automatic measurement and compensation, as well as a “Custom Voicing” course that gives users the power to realize a specific acoustic concept through extensive control over all aspects.
Most operations are controlled using the large, high-definition wide-format color LCD panel. This makes using the supplied stylus pen a pure joy, enabling the user to create any desired response simply by drawing on the screen. The DG-58 takes the concept of intelligent equalization to the next level, while at the same time remaining simple and intuitive to operate, thanks to its clean and uncluttered graphical interface.

• Fully digital signal processing Voicing Equalizer
• High-speed 40-bit floating point DSP
• Separate digital filters for Voicing and Equalizer sections
• Wide-format color LCD panel allows direct drawing of response curve with stylus pen
• Freely programmable 30 pattern memory
• Real-time spectrum analyzer for display of music signal and microphone input
• Analog and digital inputs/outputs provided as standard

Voicing
1/6 octave 67-band IIR filter
Adjustment range: ±12 dB
●
Equalizer
1/6 octave 80-band IIR filter
Adjustment range: ±12 dB
●
Measurement signal
Warble tones
●
Frequency response curve input principle
Direct drawing with stylus pen and input with cursor keypad
●
Spectrum analyzer
1/3 octave, 35-band real-time type
Display level: +18 dBFS to -90 dBFS (5 ranges, switchable)
●
Reproduction frequency
0.5 - 50,000Hz +0 -3.0 dB
(Sampling frequency: 2.8224 MHz or 192 kHz)
4.0 - 20,000Hz +0 -0.3 dB
●
THD + Noise
(from analog inputs to analog outputs, 20 - 20,000 Hz)
0.001
％
●
Gain
+12 to - 90 dB, variable
●
Analog input
GAIN
＋
6 dB
:
0.89 V
maximum level
GAIN
0 dB
:
1.78 V
GAIN
-
6 dB
:
3.55 V
●
A/D converter
Principle:
Advanced multi-bit delta-sigma modulation
Sampling frequency
: 44.1 kHz, 88.2 kHz, 176.4 kHz
Resolution: 24 bits
●
D/A converter
Principle: 8
MDS++
Sampling frequency:
32 kHz - 192 kHz
Resolution: 32 bits
●
Digital inputs
HS-LINK Connector type: RJ-45
Suitable cable: Dedicated HS-LINK cable
COAXIAL Format: IEC 60958 compliant
OPTICAL Format: JEITA CP-1212 compliant
●
Sampling frequency
32 kHz, 44.1 kHz
,
48 kHz, 88.2 kHz, 96 kHz
,
176.4 kHz, 192 kHz
(
16 to 24-bit 2-channel PCM
)
(
O
PTICAL
to
96 kHz
)
[Only via HS-LINK] 2.8224 MHz (1-bit 2-channel DSD)
●
Digital outputs
HS-LINK Connector type: RJ-45
Suitable cable: Dedicated HS-LINK cable
COAXIAL Format: IEC 60958 compliant
OPTICAL Format: JEITA CP-1212 compliant
●
USB port
USB 2.0/3.0 (up to 128 GB), for flash memory
(Cannot be used for connection to a computer)
●
Operating system
Microsoft
®
Embedded Compact 7
®
●
Power requirements
120 V, 220 V, 230 V AC (voltage as indicated on rear panel), 50/60 Hz
●
Power consumption
24 W
●
Maximum dimensions
Width 465 mm (18.31")
Height 161 mm (6.34")
Depth 396 mm (15.59")
● Mass
14.3 kg (31.5 lbs) net
22.0 kg (44.1 lbs) in shipping carton