Page 1
PRECISION DIGITAL PREAMPLIFIER
DC-330
m Fully digital preamplifier with ultra high-speed digital signal processing
m Ready for new-generation formats such as SACD and DVD-Audio
m Newly developed MDS type D/A converter minimizes distortion and
assures outstanding S/N ratio m High-precision tone controls and
loudness compensation implemented in the digital domain m Volume
control with familiar analog feeling m Ultr a jitter-free PLL circuit topology
Page 2
Leaving the analog/digital division far behind this digital preamplifier
features ultra high-speed DSP and complete readiness for the new
generation of super high quality audio sources. The newly developed
MDS (Multiple Delta Sigma) converter with 24-bit ultra high precision
resolution results in dramatically enhanced performance. Witness a new
dimension of audio perfection.
The DC-330 builds on the foundation of the
DC-300, with some significant advantages over
its predecessor. Ease of use has been further
enhanced, and latest digital technology and
redesigned circuitry assure total compatibility
with the emerging new generation of top-quality
audio sources such as SACD and DVD-Audio.
The digital volume and tone controls function
with previously unattainable precision, yet their
smooth operation feel is on a par with the best
of analog equipment. Internally, the DC-330
features ultra high-speed digital processing
performed by a latest-generation DSP device.
D/A conversion is handled by an inno vative MDS
(Multiple Delta Sigma) converter which boasts
superior accuracy. This makes the DC-330
capable of bringing out the full potential of a
new breed of audio sources that is just
emerging, such as the Super Audio CD (SACD)
and DVD-A udio. During the dev elopment of this
amplifier, countless listening sessions were held
to arrive at the detailed, rich sound that is a
hallmark of every Accuphase product.
In a preamplifier, the part that has a decisive
influence on the sonic end result is the section
where adjustments such as volume, tone, and
loudness compensation are carried out. In the
digital DC-330, this task is handled by an
extremely fast DSP that assures a drastic leap
in performance, achieving outstanding
signal-to-noise ratio, amazing channel
separation, and totally negligible distortion. The
overall result is utterly natural and realistic sound
with full control over every vital aspect.
To provide complete flexibility with a view to
future expansion, all inputs and recording
Left
Option
Slot 8
Analog Input
Right
AI2-U1
Option
Slot 7
Digital
Input/Output
DIO-OC1
Option
Slot 6
Option
Slot 1
External
DSP
Option
(
DIO-OC1
Volume
Control
Outputs
Option
(
DIO-OC1
24-bit A/D
Converter
Coax
RX
Opto
RX
Coax
Opto
RX
Coax
)
Opto
RX
Coax
RX
Opto
)
RX
Volume
DAI
Decoder
Volume
Information
outputs of the DC-330 are implemented as
option boards. The option board slots support
the ADB2 (Accuphase Digital Bus 2) interface
which accommodates also formats such as
SACD and DVD-A udio . The DC-330 comes with
a line input board for analog signals and a digital
input/output board installed as standard
equipment.
As a perfect blend of analog operation feeling
and sophisticated digital technology, the DC-330
transcends the mechanistic division of “analog”
or “digital”, fusing them both into a higher
dimension that is devoted solely to the
enjoyment of music.
Fully digital preamplifier with ultra
high-speed DSP and support for high
sampling rates: 2.8224 MHz/1-bit and 192
kHz/24-bit.
Figure 1 shows the block diagr am of the DC-330.
Digital sources are connected via coaxial or
optical inputs located on option boards. All
option board slots of the unit are ready to handle
the bit stream output of a SACD player which
uses 2.8224 MHz/1-bit,
as well as the 192 kHz/
24-bit signal used for
DVD-Audio. Other
high-quality formats that may emerge will also
pose no problem to the DC-330. After the input,
an ultra jitter-free PLL
circuit extracts a
high-precision
reference signal totally
free from the adverse
Digital
Isolator
DSP
Tone
Comp
Mono
Phase
Ultra
Jitter-Free
PLL
Master
Clock
Digital
Isolator
DAI
Encoder
Fig. 1 DC-330 block diagram
MDS 24-bit
D/A Converter ×6
∆Σ
Digital Filter
Volume
Balance
Attenuator
MDS 24-bit
D/A Converter ×6
∆Σ
Digital Filter
Volume
Balance
Attenuator
3-Pole
Linear
Phase
Low Pass
Filter
Balanced
Buffer
3-Pole
Linear
Phase
Low Pass
Filter
Balanced
Buffer
effects of pulse transmission distortion and jitter.
After conversion into the internal format of the
DC-330, a DSP (Digital Signal Processor)
operating at extremely high speed performs
some of the
major tasks that
are handled by a
preamplifier,
such as tone
control, loudness
compensation,
as well as mono
and phase
switching. All of
Ultra high-speed DSP
these adjustments are accomplished entirely in
the digital domain.
An ultra high-speed “isolated digital coupler”
ensures effective electrical separation between
the digital section encompassing the DSP and
the D/A converter and subsequent analog
segments of the amplifier. After digital volume,
balance, and attenuation processing, the signal
reaches the newly developed MDS type D/A
converter which produces an analog signal of
utmost precision. A 3-pole linear phase low-pass
filter then removes any remnants of the digital
process, before sending the signal to the
balanced and unbalanced outputs.
Innovative MDS (Multiple Delta Sigma)
converter reduces distortion to theoretical
limits and assures outstanding S/N ratio
The D/A converter which has considerable
bearing on the sonic end result is a newly
developed type that provides
excellent performance in all aspects.
The MDS (Multiple Delta Sigma)
Unbalanced
Outputs
1
2
Left
Analog
Outputs
1
principle employs sev eral delta sigma
type converters in a parallel
configuration which results in a
drastic precision enhancement. The
delta sigma principle combines
oversampling with noise-shaping (a
kind of digital feedback) which
projects the amplitude information of
the digital signal onto a time axis for
precise conversion. Figure 2 shows
Balanced
Outputs
2
several delta sigma con verters which
are fed with the same signal and
whose outputs are combined to arrive
Unbalanced
Outputs
1
2
Right
Analog
Outputs
1
at the overall waveform. In the
DC-330, six delta sigma converters
are operated
in parallel,
which results
in a performance
Balanced
Outputs
2
improvement
by a factor of
2.45 (=√6). An important
characteristic of the MDS principle
is that the performance benefits are
achieved regardless of signal
Page 3
n This photograph shows the DC-330
with separately available option boards
installed and with the shielding cover
removed.
frequency and signal level. Therefore
noise at very low signal levels that was
difficult to contain with conventional delta
Signal
Conversion error
1
S
e
1
S
2
e
2
Sn-
1
en-
1
S
n
e
n
MDS
output
e
S
0
0
Digital
input
DAC
#1
#2
#1
#
n
Fig. 2 MDS type D/A converter principle
sigma converters now could be drastically
reduced. The audible result is music
reproduction emerging from utter silence with
an impressive sense of clarity and nuance.
Volume control with smooth analog feel
A massive knob on a precision-machined shaft
rotates a disc with star-shaped slits which
generate a series of pulses in
a phase detector. These
pulses are utilized by a
microprocessor to govern the
volume control function. For the user,
the volume control of the DC-330 operates
with a silky smooth and natural feel that perf ectly
matches the audible change in volume. The
current volume setting is indicated by the
numeric display and also by an array of LEDs
on the circumference of the control. This lets
you check the setting at a glance.
Linear phase analog filters provide superior
characteristics
The analog filter, which serves to remove
aliasing noise in the extreme upper frequency
range, is a 3-pole linear phase type filter with
outstanding phase characteristics. The cutoff
frequency is optimized to minimize phase shift
within the passband. Strict selection of all filter
components assures sonic purity and total
musical accuracy.
D/A converter with printed circuit boards
made from Teflon (glass fluorocarbon resin)
with low dielectric constant and low loss
The D/A converter boards use a substrate of
n PCB assembly with analog
output connectors (balanced
and unbalanced, 2 each) and
MDS D/A converter (2 boards
for left and right) using Teflon*
(glass fluorocarbon resin)
substrate with low dielectric
constant and low loss.
n Supplied remote commander
RC-24
Allows input selection and
adjustment of volume, tone
control on/off, loudness compensator on/off, attenuator
on/off, and other functions.
glass fluorocarbon resin which has a stable, low
dielectric constant as well as superior heat
resistance and high-frequency characteristics.
Using this material for the audio circuitry assures
signal transmission with utmost purity , resulting
in a clear improvement in perceived signalto-noise ratio. In the DC-330, gold-plated copper
Page 4
DC-330 Application Examples (Option model names given in brackets.)
Digital input
✽The digital input/output board (DIO-OC1) installed as
standard equipment allows connection of a CD
transport, or other digital devices, via coaxial cable (2
connectors) or Toslink optical cable (2 connectors).
✽Option boards can be added for BNC (DI-BNC1), HPC
optical cable (DIO-ST1), and HPC balanced cable
(DIO-PRO1).
SACD transport (DP-100) input
✽The HS-Link option board can be added for connection of
the digital output of a SACD transport via dedicated cable.
Digital recorder facilities
✽Standard equipment digital input/output board (DIO-
OC1) allows connection of up to two digital recorders
(DAT, MD, etc.) for recording and playbac k.
✽Option boards can be added for HPC optical cable (DIO-
ST1) and AES/EBU standard digital input/output (DIOPRO1).
Analog line input
✽The line input board (AI2-U1) installed as standard
equipment allows input of analog signals from a CD
player, tuner, analog tape recorder or the analog output
of a DAT, MD or similar recorder.
✽High-quality playback of analog output signals from
SACD or D VD-Audio equipment possible (set AI2-U1,
AI2-B1 to 96 kHz).
✽Addition of balanced input (AI2-B1) possible.
Phono playback
✽The optional analog disc input board (AI-AD1) allows
playback of analog records.
✽To implement dedicated inputs for MC and MM
cartridges, install two boards.
Analog recording
✽The line input/output board (AIO-U1) allows recording
and playback with an analog tape recorder or an analog
connection of a DAT, MD or similar recorder .
✽Optional unbalanced (AO-U1) or balanced (AO-B1)
output boards provide dedicated high-quality signals
for analog recording.
EXT DSP connectors for DG-28
✽The digital input/output board (DIO-OC1 etc.) allows
connection of digital audio equipment.
✽The Digital Voicing Equalizer DG-28 performs sound
field compensation in the digital domain.
OUTPUTS connector: DF-35 connection
✽The Digital output board (DIO-OC1 etc.) allows
connection of digital audio equipment.
✽The Digital Channel Divider DF-35 allows volume
control in the digital domain.
Analog outputs
✽T wo sets of unbalanced and balanced output connectors
are provided for power amplifier connection.
Option board installation example (from left)
l OPTION 8: Line Input Board (AI2-U1)
l OPTION 7: Digital Input/Output Board (DIO-OC1)
l OPTION 6: HPC Coaxial Input Board (DI-BNC1)
l OPTION 5: Line Input/Output Board (AIO-U1)
l OPTION 4, 3: Analog Disc Input Board (AI-AD1)
l OPTION 2, 1: Balanced Input Board (AI2-B1)
l EXT DSP: Digital Input/Output Board (DIO-OC1)
l OUTPUTS: Digital Input/Output Board (DIO-OC1)
Digital connection of CD transport,
or similar
Analog connection of SACD
player, DVD-Audio player,
or similar
75-ohm coaxial cable BNC cable
super audio CD player DP-1000
ANALOG OUT
Toslink optical
DIGITAL IN
CD-R, DAT, MD or other
digital recorder
DIGITAL OUT
fiber cable
mmB compacr disc player
DP-65V
DIGITAL OUT
MEMORY
STEREO
MHZ CH
SELECTIVITY METER
NORMAL SIGNAL
LINE IN
Tape recorder or other
analog recording/playback
component
Record player
75-ohm
coaxial cable
standard
equipment
optional
LOW
DIGITAL
FREQUENCY DIVIDNG
NETWORK DF-35
INPUT LOCKED
2
3
1
COAX
4
POWER
DIGITAL IN
DIGITAL OUT DIGITAL IN
LEVEL
A
FREQ
LEVEL
B
VOICING EQUALIZER
MODEL DG-28
POWER
PRPGRAM
C
D
MEMORY
CHANEL EQUALIZER
Digital Voicing Equalizer DG-28
ANALOG OUT
output level
5
6
4
3
7
2
8
9
1
0
10
Tuner, CD player or other
component with analog
output
model t-109
fm stereo tuner
@0@1@2@3@4@
station
MEMORY
STEREO
MHZ CH
SELECTIVITY METER
NORMAL SIGNAL
5
* For connection of digital equipment,
75-ohm coaxial cable, T oslink optical fiber
cable, HPC optical fiber cab le, etc. can be
used.
* For analog input/output connections,
audio cable with RCA plugs, balanced
cables, etc. can be used.
To multi-amp system
HIGH
FUNCTION
FUNCTION
FUNCTION
FUNCTION
PUSH ENTER
PUSH ENTER
PUSH ENTER
PUSH ENTER
FUNCTION
FUNCTION
FUNCTION
FUNCTION
PUSH ENTER
PUSH ENTER
PUSH ENTER
PUSH ENTER
FUNCTION
FUNCTION
FUNCTION
FUNCTION
PUSH ENTER
PUSH ENTER
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION FUNCTION
FUNCTION FUNCTION
(PUSH ENTER)
(PUSH ENTER)
75-ohm
coaxial cable
FREQ
Balanced
cable
Digital Channel Divider
DF-35
Audio connecting cable
with RCA plugs
Power amplifier
traces further contribute to sonic purity.
* Teflon is a registered trademark of DuPont USA.
Ultra Jitter-Free PLL Circuit
For the purpose of synchronizing operation of
the D/A converter with the digital audio interface
(DAI), a phase-locked loop (PLL) circuit is used
which generates a master clock to be used as
system reference. As shown in the diagram, the
Ultra Jitter-Free PLL Circuit of the DC-330
consists of a preamble detector and a
DAI input signal
Fig. 3 Ultra jitter-free PLL cir cuit
Preamble
detector
Phase
comparator
Frequency
divider
Preamble signal
(pulse distortion removed)
Loop
filter
VCO
Master clock output
(free from jitter and
pulse distortion)
voltage-controlled oscillator (VCO) using a
quartz crystal element. The master clock
produced by this PLL circuit is totally free from
the effects of pulse distortion and jitter.
Perfect separation of digital and analog
sections totally shuts out noise
Ultra-high speed isolated digital couplers rated
for 80 MBPS are used to
isolate the digital and
analog sections of the
DC-330. This ensures that
the signal is transmitted
faithfully, while noise is
totally shut out, thus
preserving the superior
sonic transparency that is a hallmark of the
DC-330.
Page 5
OPTION BOARDS
Digital Boards
For BNC coaxial cable input
HPC Coaxial Input Board DI-BNC1
Allows connection of coaxial cable with 75-ohm BNC connector.
Guaranteed specifications
l Digital input: 0.5 Vp-p, 75 ohms
Accuphase offers a wide range of digital and analog input and output boards which can be installed in
the option board slots on the unit. This allows the user to configure the system to fit any need.
l All option boards designed for the DC-300, DP-75V, DG-28, DF-35, etc. can be used.
l When an option board has been installed and is selected, the input is shown on the alphanumeric display.
l The name shown for an input can be customized.
For HPC optical fiber cable input/output
HPC Optical Input/Output Board DIO-ST1
Allows connection of an ST type optical link.
Designed for an ultra high-speed link with a transfer rate of 150 MBPS.
✽ HPC optical fiber cables (HLG-10 etc.) are available from Accuphase.
Guaranteed specifications
l Optical input: -30 to -10 dBm
l Optical output: -19 to -14 dBm
Analog Boards
For additional digital input/output
Digital Input/Output Board DIO-OC1
Provides two sets of coaxial and optical connectors, for recording/playback with
two digital recorders.
COAXIAL: for 75-ohm coaxial cable
OPTICAL: for Toslink optical fiber cable
✽ One DIO-OC1 board is installed as standard equipment in the OPTION 7
slot.
✽ Analog input signals are converted to digital signals by an on-board A/D converter. ✽ Digital output signals are con verted to analog signals by an on-board D/A converter.
✽ The AI-U1, AI-B1 can also be used.
For playback of analog sour ce equipment
Line Input Board AI2-U1
Provides a conventional unbalanced high-lev el input f or the analog output signal
from a CD player, tuner, tape recorder or similar component.
✽ One AI2-U1 board is installed as standard equipment in the OPTION 8
slot.
✽ The sampling frequency can be switched between 48 and 96 kHz.
✽ Incorporates a 96 kHz/24-bit delta sigma type A/D converter.
For analog playback of equipment with balanced output
Balanced Input Board AI2-B1
Provides a conventional balanced high-level input for the analog signal from a
CD player, tuner, recorder or similar component with balanced analog output.
✽ The sampling frequency can be switched between 48 and 96 kHz.
✽ Incorporates a 96 kHz/24-bit delta sigma type A/D converter.
For professional-standard input/output
AES/EBU Input/Output Board DIO-PRO1
Provides a set of XLR input and output connectors conforming to AES/EBU
professional digital standards.
Can be used to accept the output signal from a digital component or to perform
playback and recording with a digital recorder having the same type of connectors.
✽ HPC balanced cables (HLC-10 etc.) are available from Accuphase.
For playback of analog records
Analog Disc Input Board AI-AD1
Incorporates a high-performance, high-gain phono equalizer for playback of
analog (phono) records.
✽ Incorporates a 20-bit, 5-pole delta sigma A/D converter with 64-times
oversampling.
✽ On-board controls for MM/MC switching and subsonic filter switching
[MM] gain: 30 dB, input impedance 47 kilohms
[MC] gain: 60 dB, input impedance 100 ohms
For analog recording and playback
Line Input/Output Board AIO-U1
Provides analog inputs and outputs for use with a tape recorder.
✽ Incorporates an 18-bit, 4-pole delta sigma A/D converter with 64-times
oversampling.
✽ Incorporates an 18-bit, 4-pole delta sigma D/A converter with 64-times
oversampling.
(The signal chosen with the Input Selector is converted to analog and
output via this board.)
For high-quality analog recording
Line Output Board AO-U1
Provides analog recording output for use with a tape recorder or the analog
input of a DAT, MD or other recorder.
✽ The signal chosen with the Rec Selector is converted to analog and output
via this board.
l D/A converter: 20-bit, 4 MMB principle
l Digital filter: 20-bit, 8-times oversampling
Slots for up to 10 option boards allow
matching to any input and recording output
configuration
All inputs and recording outputs of the DC-330
are implemented as option boards. All option
board slots support the ADB2 interface standard
that makes the unit ready to handle the next
generation of audio sources, such as SACD and
DVD-Audio.
l For digital input/output, one option board DIO-OC1 with
optical and coaxial connectors is installed as standard
equipment. Other available boards include BNC, HPC
optical cable (ST), and HPC balanced input.
l The HS (High Speed) Link option board can be installed
for connection of the SACD transport DP-100.
For analog recording on equipment with balanced input
Balanced Output Board AO-B1
Provides an analog recording output for a recorder with balanced input.
✽ The signal chosen with the Rec Selector is converted to analog and output
via this board.
l D/A converter: 20-bit, 4 MMB principle
l Digital filter: 20-bit, 8-times oversampling
l For analog input, one option board, AI2-U1, with a high-
precision 96 kHz/24-bit delta sigma A/D converter is
installed as standard equipment. Playback of analog
records is also possible with a separate option board.
l The EXT DSP option board slot allows connection of the
Digital Voicing Equalizer DG-28.
l The Digital Channel Divider DF-35 can be connected to
a digital output board installed in the OUTPUTS slot,
allowing digital volume control.
ADB 2: Accuphase Digital Bus 2
Interface standard supporting also high
sampling rates above 48 kHz, such as used
by SACD and DVD-Audio.
Page 6
Ultra high-speed DSP achieves highprecision, high-quality tone control and
loudness compensation
Because the signal is being processed entirely
in the digital domain, frequency response
n DAI, DSP assembly
Contains DAI encoder/decoder, ultr a jitter-free
PLL circuit, and DSP for tone control/
compensator signal processing.
adjustments are possible without any alteration
of circuit impedance. F or the listener, this means
that sonic realism and imaging are maintained
regardless of the control setting.
Outstanding S/N ratio and channel
separation
The digital volume control of the DC-330
introduces no quality deterioration regardless
of the level setting, resulting in outstanding
perceived signal-to-noise ratio. Digital
processing also completely eliminates the
problem of inter-channel crosstalk.
User-editable alphanumeric input position
indication
When the input selector is operated, input
sources are shown on
the display of the
DC-330 using alphanumeric characters. If
desired, any position can be renamed, using a
choice of 96 characters and symbols. A large
number of ready-made names such as SACD,
DVD, CD, MD, etc. are also available.
Fully balanced analog output circuitry
The analog output section features completely
balanced circuitry which is isolated from the
ground line. Two sets of balanced XLR
connectors and unbalanced RCA-type phono
connectors accommodate any system
requirements.
n FRONT PANEL
ABCD
FGHIJM NL
K
E
n REAR PANEL
Line input board installed as standard equipment
Digital input/output board installed as standard equipment
Option board slots
OUTPUTS: option board slot for connection of DF-35
EXT DSP: option board slot for connection of DG-28
A Input selector
B BASS/TREBLE controls
C Loudness compensator selector
D Balance control
E Volume control
F Power switch
G Output ON/OFF button
H Phase selector button
I Mono/stereo selector button
n Optional cables (available in 2 m, 3 m, and 5 m lengths)
l HPC optical fiber (ST) HLG-10 (1 m)
l HPC balanced cable HLC-10 (1 m)
l Toslink optical fiber LG-10 (1 m)
Remarks
H
This product is available in versions for 120/230 V AC. Make sure that the voltage shown on the rear panel matches the AC line voltage in your area.
H
The shape of the AC inlet, plug of the supplied power cord, and AC outlet depends on the voltage rating and destination country.
H
These unswitched AC outlets may not be supplied depending on the safety standards or regulations applicable in the particular country to where the unit is destined.
n Supplied accessories l AC power cord
l 75-ohm coaxial cable (DL-15)
l Audio cable with RCA plugs
l Remote Commander RC-24
J T one control ON/OFF b utton
K Loudness compensator ON/OFF button
L External digital equipment ON/OFF button
M Display mode/edit buttons
N Attenuator buttons
O Analog output connectors
(Unbalanced, balanced; 2 each)
P AC outlets
Q AC input connector (for supplied power cord)
OP
H
(
(
Q
[Guaranteed specifications are measured according to EIAJ standard CPR-2101]
l Input format: Quantization bits: 16 to 24 bits, linear
(EIAJ CP-1201 standard format)
l Digital input format level Format: Digital audio interface
(EIAJ CP-1201)
l Digital output format level Format: Digital audio interface
(EIAJ CP-1201)
l Frequency characteristics 0.5 to 50,000 Hz +0, –3 dB
l D/A converter 24-bit MDS converter
l Total harmonic distortion 0.0006% (20 to 20,000 Hz)
l Signal-to-noise ratio 120 dB
l Dynamic range 112 dB (24-bit input, low-pass filter off)
l Channel separation 106 dB
Output voltage and impedance
l
(DSP)
l Volume control Linear mode: –
(DSP)
l Balance control Left/right level difference:
(DSP)
l Tone control Crossover frequency and adjustment range
(DSP)
l Loudness compensator 1: +3 dB (100 Hz)
(DSP)
l Attenuator (DSP) –20 dB
l Power requirements
l Power consumption 25 W
l Maximum dimensions Width 475 mm (18-11/16” )
H
l Weight 20.2 kg (44.5 lbs) net
Supplied Remote Commander
l
RC-24
DC-330 Guaranteed Specifications
Sampling frequency (auto detect):
32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz,
176.4 kHz, 192 kHz, 2,8224 MHz
[implemented as option board]
OPTICAL: Optical input, –27 to –15 dBm
COAXIAL: 0.5 Vp-p, 75 ohms
[implemented as option board]
OPTICAL: Optical output, –21 to –15 dBm
COAXIAL: 0.5 Vp-p at 75 ohms
[implemented as option board]
BALANCED: 5 V at 50 ohms, balanced XLR type
UNBALANCED: 5 V at 50 ohms, RCA phono jack
dB mode: – , –94.0 to +12.0 dB,
Speed-sensing principle
Bass: 315 Hz ±5 dB (50 Hz), 1 dB steps
Treble: 3.15 kHz ±5 dB (20 kHz), 1 dB steps
2: +6 dB (100 Hz)
3: +6 dB (100 Hz), +3 dB (20 kHz)
4: +9 dB (100 Hz)
5: +9 dB (100 Hz), +6 dB (20 kHz)
120 V / 230 V (V oltage as indicated on rear panel), 50/60 Hz
Height 150 mm (5-7/8” )
Depth 412 mm (16-1/4”)
25.2 kg (55.6 lbs) in shipping carton
Remote control system: Infrared pulse
Power requirements: 3 V DC, IEC R03
Dimensions: (W×H×D) 66 mm × 175 mm × 20 mm
Weight: 220 g (including batteries)
Wavelength, 660 nm
, 0.5 to 99.5
(in 0.5 steps), Max.
, –4 to 0 dB (in 1 dB steps)
–
(size AAA) batteries × 2
m Specifications and design subject to change without notice for improvements.
PRINTED IN JAPAN K9910 851-0164-00 (AD1)
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