● Revolutionary AAVA volume control ● Output stage with triple parallel push-pull power MOS-FETs
produces quality power: 180 watts x 2 into 8 ohms ● Instrumentation amplifier principle for power
amplifier input stage allows fully balanced signal transmission, complemented by MCS+ topology andcurrent feedback amplification circuitry ● Logic-control relays for shortest signal paths ● Strong power
supply with massive high-efficiency transformer and large filtering capacitors ● POWER IN button allows
separate use of preamplifier and power amplifier sections ● Numeric indication of volume level

The Excitement and Dynamism of High PowerAn integrated amplifier approaching
the performance grade and functionality of separate components. Preamplifier section
features latest version of AAVA volume control with even higher performance, alongwith instrumentation amplifier configuration for fully balanced signal paths. MCS+
topology and current feedback principle for amplification circuitry enable extremely
low output impedance and realize a damping factor exceeding the 500 mark. Triple
parallel push-pull arrangement of power MOS-FET devices together with massivepower supply deliver 260 watts per channel into 4 ohms.
separate type components. With a simple flick of a switch, thePOWER IN feature allows individual use of the two sections.
At the heart of the preamplifier section is a further evolved AAVA
type volume control, and the power amplifier block is configured
with the latest instrumentation amplifier topology, enabling fullybalanced signal transmission throughout. The MCS+ approach
improves crucial performance parameters by employing multiple
identical circuits in parallel, and current feedback provides
optimum stability. As a result, the low impedance output stageachieves a damping factor of 500. MOS-FET switches are used inInheriting outstanding technology from Accuphase's 40thanniversary commemorative models such as the preamplifier
C-3800 and power amplifier A-200, the E-470 represents a fullmodel change from the E-460. As the seventh generation entry in
the E-400 series, it features advanced design technology andstate-of-the-art circuitry, giving this high-class integrated amplifier
an almost uncanny power to reproduce even the finest nuances in
the music. Internally, the preamplifier and power amplifier sections
are kept entirely separate, in order to allow each to develop theirfull potential, rivalling the performance and sonic excellence of

place of relays for speaker protection, helping to ensure superb
electrical characteristics and improve long-term reliability. Power
MOS-FET devices arranged in triple parallel push-pull pairs foreach channel greatly enhance the ability of the amplifier to drive
low-impedance loads. Output operation is sustained by themassive power supply with a large toroidal power transformer andfiltering capacitors with high capacity. With plenty of reserves,
as demonstrated by the rating of 260 watts x 2 into 4 ohms or180 watts x 2 into 8 ohms, the E-470 creates a sound stage ofbrilliant musicality and amazing realism.

■ Power MOS-FETs in triple parallel push-pull configuration deliver ample power: 180 watts/channel into 8 ohms
or 260 watts/channel into 4 ohms.
■ Power amplifier stage features instrumentation amplifier configuration for balanced signal transmission.
MCS+ topology and current feedback principle assure excellent phase characteristics in high range.
■ Strong power supply with massive high-efficiency toroidal transformer and large filtering capacitors (40,000 µF x 2).
■ Individual phase setting supported for each input position.
■ Versatile array of inputs with two balanced inputs to shut out external noise interference.
■ POWER IN button along with preamplifier output and power amplifier input connectors allow independent useof both sections. Both line level and balanced connectors are provided.
Toroidal power transformer■ Semiconductor (MOS-FET) switches used for speaker protection circuitry
prevent contact problems and ensure long-term reliability. Eliminating
mechanical contacts from the signal path also further enhances sound quality.
■ Two option board installation slots on the rear panel provide further versatility.
With the AD-30 or AD-20 board, MC/MM switching on the front panel is possible. POWER IN selector button DAC input selector button and LED indicators■ DAC input selector button allows input selection when using the Digital
Input Board DAC-40 With USB Port. Display of the sampling frequency ofthe locked digital signal is also possible.
■ Logic-controlled relays for signal switching assure high sound quality
Sampling frequency
PHASE selector button MC/MM selector button
and long-term reliability.
display example■ Dedicated headphone amplifier optimized for sound quality.
■ Analog peak power meters with new type of LED lighting.
■ Two sets of large-size speaker terminals accept also Y lugs.
■ Balanced remote sensing technology provides
balanced feedback for both the signal and GND
lines from near the speaker terminals to ensure
low impedance and high damping factor.
Large speaker terminals

Preamplifier balanced
output connectors

Power amplifier balanced
input connectors

16Speaker terminals−– GND＋Ground sensing

Response in dB

640−20−4−8−12−4−610100

1kFrequency in Hz

10k100k

Loudness Compensator Characteristics

Balanced Remote Sensing

42Cut

−

8Response in dB+ Signal

High frequency
range

Low frequency
range

8

LOUDNESS COMPENSATOR：ON

10＋POWERAMP.
NFBNETWORK

Protection circuitry

1412NFBNETWORKNFBNETWORK– INPUT

Boost−

1216Signal sensing

MOS-FET switchesLine and balanced input/output connectors

18＋+ INPUT

Filtering capacitors−1610BASS
adjustment range

TREBLE
adjustment range

10010k1kFrequency in Hz

Tone Control Characteristics

AAVA (Accuphase Analog Vari-gain Amplifier) Volume Control
2 parallel circuits
1 ★
2

16 current switches(65,536 possible combinations)

AAVA configuration in E-470■ Configuration with a total of 18 V-I converter amplifiers, paralleled for upper
two units, reduces overall AAVA impedance to one half and results in lower
noise. Input stage with five buffer amplifiers ensures powerful drive capability.
■ No more left/right tracking differences or crosstalk.
■ Amplifier display shows accurate gain as numeric indication.

1 ★
22

Input music signal

I-V Converter
Reconversion ofcurrent into voltage

123＋ Current

BUFFERINPUTOUTPUTLEVEL DISPLAY

1215

1216

V- I Converter
CPUConversion into current with
16 weighting stages(1/2 - 1/216)

VolumeBalance
Attenuator

CPU detects position of volume knob
and operates current on/off switches
according to knob position■ Attenuator and balance control also implemented by AAVA, eliminating
additional circuitry.
■ Volume control resolution: Combination of V-I converter amplifiers gives
65,536 possible volume steps.

I-Vvalues areadded

5-MCS■ High S/N ratio, low distortion, uniform frequency response and optimal soundquality maintained at any volume setting.

Volume knob is turnedand position is detected

100kLogic-controlled relays and line input and output connectors

Protection circuit assembly

Large heat sink andpower amplifier assembly

Option board slots

Massive high-efficiency power transformer

Large heat sink andpower amplifier assembly
Large filtering capacitors

AAVA volume controlassembly■ Supplied remotecommander RC-220
Allows volume adjustment
and input source switching.

290W
250W

300

250260W
200W

180W

150

100

Output power (W)

200

220W

Power MOS-FETs
50

Power amplifier assemblyPower amplifier assembly and output stage
with triple parallel push-pull power MOS-FETs
directly mounted to large heat sink.

Max. output power
Rated output power

8Ω

6Ω

4Ω

Impedance (Ohms)

Output power characteristics
Signal input stage

Power amplifier stage
MCS+ (Multiple Circuit Summing)Biasstabilizer+ B1

REGULATORQ1+ INPUT

Q5Q9Q 13Q7Q 11Q 15＋−Q3NFBNETWORKQ 17Q 19

Q 21

Q 23

Q 25Bias
stabilizer

NFB
NETWORKOUTPUTBias
stabilizer

NFB
NETWORK−–INPUT+ B2Q2Biasstabilizer

Q6Q 10

Q 14

Q8

Q 12

Q 16＋

■ AAVA volume control assemblywith circuit impedance lowered
to 1/2 and improved S/N ratio

Q4

Q 18

REGULATOR

Q 20

Q 22

Q 24

Q 26

– B2– B1

Biasstabilizer

Circuit diagram of E-470 amplifier section (one channel)

Connection Example For Bi-amping Setup＊ The example shows asetup with an additional
amplifier for the highfrequency range
RIGHTE-470

Left loudspeakerslots allowing easy
insertion of option boards
are provided on the rearpanel.

⊖ ⊕⊖ ⊕LOWHIGH

Right loudspeaker● COAXIAL: For 75-ohm coaxial cable● Option boards can be used

Supported sampling frequency
range: 32 kHz to 192 kHz, 24 bit

to implement high-quality
reproduction of a digitalmusic signal supplied
directly to the amplifier, or
high-quality reproductionof analog records.

⊖ ⊕⊖ ⊕HIGHLOW● OPTICAL: For optical fiber cable

DAC-40AD-30Photo shows an example for
option board installation.

two identical boards.

LEFT

Coaxial digital cable(Up to 192 kHz/24 bit)

Analog Disc Input Board● MC/MM switching is possible on the front panel

Digital component

Digital (S/PDIF) outputof the E-470.
● Internal DIP switches control MC input impedanceand subsonic filter on/off.

Optical fiber cable
RIGHT− ＋ − ＋To INPUT
CD player■ Front panel
q Input selector

DAC-40Power amplifier (P-4200, A-36 or similar)

B connector( UpTypeto 192 kHz/24 bit (Computer＊For playback of material on a computer via the USB port, it isnecessary to install software from the supplied USB Utility
CD-ROM. (Not required with an Apple Macintosh computer.)e Function LED indicators
w Volume level display
r Volume control

66 dB

Gain:

40 dB

MM Input impedance: 47 kilohms

USB cable

Analog output

Gain:

MC Input impedance: 30/100/300 ohms (selectable)(Up to 96 kHz/24 bit)

LEFT

AD-30

Features a high-performance, high-gain phonoequalizer for playback of analog records withoutstanding sound quality.

DAC-40 connection example

From PRE OUT

Supported sampling frequency
range: 32 kHz to 96 kHz, 24 bit
For USB cable (Type B connector)
Supported sampling frequency
range: 32 kHz to 192 kHz, 24 bit● USB:● It is also possible to install− ＋ − ＋DAC-40

Features a high sound quality, high-performance
MDS++ D/A converter. The USB port allows
connection to a computer via USB cable, forreproduction of high-resolution music librarydata with superior sound quality.

● Two

In a bi-amped setup, the speaker units for the LOW frequency
range and HIGH frequency range are driven by separate
amplifiers of equal gain, for even better sound quality.
＊ The speakers must have abuilt-in crossover networkand separate inputs for
LOW and HIGH range.

Digital Input Board

Option Boards

Line Input Board

LINE-10Provides a set of general line level inputs.

E-470 Guaranteed Specifications[Guaranteed specifications are measured according to EIA standard RS-490.]● Rated Continuous Average Output Power (both channels operating simultaneously, 20 - 20,000 Hz)
260 W/ch4-ohm load
180 W/ch8-ohm load
● Total Harmonic Distortion (both channels operating simultaneously, 20 - 20,000 Hz)
0.05%
4 to 16 ohm load!3 Headphonet Power switchu Bass control
i Treble control
y Function selector buttons o Left/right balance
control
Speakers ON/OFF A/B,
MONO/STEREO switching,Preamplifier/power amplifier separation,
Phase switching
Tone controls ON/OFF■ Rear panel!4 Line inputs
TUNER / CD / LINE 1, 2, 3
Option Board
installation slots

jack!2 Attenuator● Intermodulation Distortion

0.01%● Frequency Characteristics

HIGH LEVEL INPUTAt rated continuous average output:
20 - 20,000 Hz 0, -0.5 dB
POWER INAt rated continuous average output:
20 - 20,000 Hz +0, -0.2 dB
At 1 watt output: 3 - 150,000 Hz +0, -3.0 dB● Damping Factor

500 (with 8-ohm load, 50 Hz)● Input Sensitivity, Input Impedance!1 Loudness compensator
Sub panel!5 Recorder input/output connectors!6 Preamplifier output connectors (Line)!7 Power amplifier input connectors (Line)!8 Left/right speaker output
terminals (A/B, 2 sets)

Input

For rated output For 1 W output (EIA) impedance

HIGH LEVEL INPUTBALANCED INPUTPOWER IN!0 Function selector buttons

Recorder ON/PLAY selection
DAC input switching, Meter ON/OFF
Display mode switching, MC/MM switchingSensitivity

Input

Pressing this button
opens the sub panel.

190 mV
190 mV1.51 V14.2 mV
14.2 mV
113 mV

20 kΩ
40 kΩ
20 kΩ

● Output Voltage, Output Impedance
PRE OUTPUT 1.51 V 50-ohm (at rated continuous average output)● GainHIGH LEVEL INPUT → PRE OUTPUT: 18 dB
POWER IN
→ OUTPUT：28 dB● Tone Controls

Turnover frequency and adjustment range
BASS:
300 Hz ±10 dB（50 Hz）
TREBLE:
3 kHz ±10 dB（20 kHz）● Loudness Compensation ＋6 dB（100 Hz）● Attenuator−20 dB● S/N Ratio, Input-converted Noise

Input shorted (A weighting) S/N ratio(EIA)
S/N ratio at rated output
HIGH LEVEL INPUT
109 dB97 dB
BALANCED INPUT
102 dB
97 dB
POWER IN
125 dB
101 dBInput!9 CD/LINE balanced input connectors
Pin ② −, Pin ③ ＋＊Can be changed with phaseselector button y(Balanced)

Logarithmic peak level indication, shown in dB and %● Load Impedance

4 - 16 ohms

● Stereo Headphones

Suitable impedance: 8 ohms or higher● Power Requirements

120 V/230 V AC, 50/60 Hz (Voltage as indicated on rear panel)● Power Consumption

92 watts idle
420 watts in accordance with IEC 60065
611 watts for rated output into 8 ohms

@3 AC power connector ★
@2 Power amplifier input connectors(Balanced)@0 Preamplifier output connectors● Power Meters@1 Phase selector switch for balanced power
amplifier inputs● Maximum Dimensions Width
HeightDepth● Mass465 mm (18.31”)
181 mm ( 7.13”)428 mm (16.85”)

24.5 kg (54.1 lbs)
31.0 kg (68.3 lbs) in shipping carton

Remarks
This product is available in versions for 120/220/230 V AC. Make sure that the voltage shown on the rear panel matches the AC line voltage in your area.
230 V version has an Eco Mode that switches power off after 120 minutes of inactivity.
The shape of the AC inlet and plug of the supplied power cord depends on the voltage rating and destination country.
■ Supplied accessories:●●●

AC power cord
Remote Commander RC-220

The specifications and appearance of this product are subject to change without notice.

5年間保証K1405Y PRINTED IN JAPAN 850-2188-00（B1）