m MCS topology in preamplifier and power amplifier sectionsm Parallel push-pull output stage delivers high quality power 90 watts
× 2 into 8 ohms m Current feedback principle in power amplifier
combines superb sound with total operation stability m Logic-control
relays permit straight and short signal paths m Option board slot
provides capability for digital signal input and analog record playback

Featuring further improved MCS topology in preamplifier and power amplifier
sections – Enjoy total sonic realism emerging from a background of utter
silence. Wide-band power transistors in parallel push-pull configuration,working in conjunction with the rugged power supply deliver plenty of quality
power: 115 watts per channel into 4 ohms or 90 watts into 8 ohms. Option
board slot can be used to implement digital signal input for even better CD
reproduction or analog record playback with impeccable quality.
The integrated amplifier series E-200 enjoys anenviable reputation, both in Japan and abroad. The
E-213 embodies the sophisticated design conceptof this series while featuring latest circuit topology
and top quality materials. This results in further
improved sound from an integrated amplifier thatexcels in all aspects. It brings out the inherent
qualities of the source with total fidelity. Embark on
a journey of musical discovery and discover thesheer beauty of sound.
An integrated amplifier offers various advantages
such as convenient operation and modest spacerequirements. However, because its overall gain isvery high, even the slightest interference or crosstalkat the input can have a considerable effect on thesonic result. To preclude this possibility, the E-213
is designed to achieve total electrical and structural
separation of the preamplifier and power amplifier
sections. These two parts operate as if they wereentirely separate components, which significantly
enhances the purity of sound. An EXT PRE switch
and dedicated inputs even allow independent useof the power amplifier section.
Both the preamplifier and power amplifier use theproprietary MCS (Multiple Circuit Summing)
principle developed by Accuphase, whichsignificantly improves S/N ratio and other vital
parameters. In addition, the power amplifier section
incorporates the highly acclaimed current feedback
topology from Accuphase. This ensures excellent
phase characteristics in the high frequency range,
combining total operation stability with outstanding
frequency response.
The power amplifier output stage adopts a parallelpush-pull configuration of multi-emitter powertransistors designed for high-power audio
applications. The large power transformer in thepower supply and plenty of filtering capacity sustain
ample high-quality output power. The preamplifier
section comprises features such as tone controls,
loudness compensator, and facilities for recorderconnection. Each circuit component has been
carefully selected after extensive tests. The end
result is an integrated amplifier that clearly stands

out from the rest. An option board can be used to
implement digital inputs or high-quality analog
record playback.
Accuphase proprietary MCS topology inpreamplifier and power amplifier stages
Both the preamplifier and power amplifier employ
the MCS (Multiple Circuit Summing) topology

configuration is adopted with fullyparallel operation of the entire
amplification chain, not only a part of thestage. Mathematically, when using twoparallel circuits, the improvement in S/N ratio
is a full 3 dB.
Parallel push-pull power amplifier units deliver
quality power: 115 watts/channel into 4 ohms
or 90 watts/channel into 8 ohms
The output devices are multi-emitter powertransistors designed for high power audio
applications. These devices have excellent

developed by Accuphase. This design results insignificantly improved performance characteristics
such as higher S/N ratio and lower distortion. In thepower amplifier section (Figure 1), the same signal
is supplied to two separate circuits, which also
receive the feedback signal. After amplification, theoutput is then combined. In the preamplifier (lineamplifier) as shown in Figure 2, a complete MCS

High-power transistors

frequency response, forward-current transfer ratio
linearity, and switching performance characteristics.
They are connected in a parallel push-pull
configuration and mounted directly on a large heatsink to assure efficient dissipation of thermal energy.
Current feedback circuit topology in the power
amplifier section prevents phase shifts andassures excellent sound quality
In the power amplifier section of the E-213, theINPUTCurrent
adder

OUTPUT

Input

Outputconverter

AmplifierTrans-impedance
amplifierBufferCurrent NFB
networkFig. 2 Circuit diagram of line amplifier (one channel)

Fig. 3 Principle of current feedback amplifier

REGULATOR

Q 3a
REGULATOR

Q 1a+ B1+ B2

Q9Q 11Q 13signal current rather than the moreconventionally used voltage is used forfeedback. Because there is almost nophase shift, phase compensation can be
kept to a minimum, resulting in excellent
transient response and superb sonictransparency. Furthermore, frequencyresponse remains unchanged even whengain changes.

Q7Q 2aQ5NFBNETWORKREGULATOROUTPUT

INPUT
REGULATOR

Q 3b
Q 1b+–Gain

BIAS STABILIZERCIRCUIT(Large)

Q 4a

Q6Q8Frequency

Q 10

Q 12

Q 14– B2
REGULATOR

Q 2b
Q 4b
REGULATOR

Fig. 1 Circuit diagram of power amplifier (one channel)– B1(High)

Fig. 4 Frequency response with current feedback(Response remains uniform also when gain changes)

Figure 4 shows frequency response
curves for different gain settings of thecurrent feedback amplifier. It is evident
that characteristics remain uniform overa wide range.

n Supplied remote commander RC-23
Allows volume adjustment and input
source switching

Large power transformer and high filtering
capacity
Power amplifier assemblywith parallel push-pull output
devices mounted to large heatsink, MCS circuit, and current
feedback amplifier circuitry

The E-213 features alarge power transformer with a rating of
400 VA. The transformer is mounted in
an enclosure filledwith damping material
that has excellent
heat transfer characteristics. This design
prevents unwanted
interaction with therest of the amplifier.
Two massive electrolytic capacitors, each
rated for 22,000 µF,
are used to filter thecurrent. This ample
performance marginof the power supply
ensures dynamic sound down to very deep frequencies.
EXT PRE switch and power amplifier inputs
allow separate use of power amplifier section

Highly reliable logic-controlled relays for bestsound quality
Program source switching is performed by logiccontrolled relays which are arranged so as to permit
straight and short signal paths for enhanced sonicpurity. The hermetically sealed relays are highquality types developed specifically for demanding
communication applications. The contacts are twincrossbar types plated with gold for minimum contact
resistance and outstanding long-term reliability.

Tone controls use summing active filters forpure soundThe tone control circuitry in the E-213 features summing active filters. Figure 5 illustrates the operation
principle of this circuit. The flat signal is passed
straight through, and only when an adjustment isrequired,the characOUTPUT
INPUT
teristics creAA
ated at F 1
Fand F 2 areadded to theVRs i g n a l ,Fthereby proVR
ducing thedesired
Fig. 5 Tone control circuit principle
change.
(Summing active filter type)This design
provides efficient control without degrading signal
purity.
2

1

1

Two sets of heavy-duty speaker terminals

1

2

2

Gold-plated input/output jacks
connected directly to relays

The preamplifier section
and power amplifier section
are designed as separateentities. A convenient EXT
PRE switch and dedicatedinputs make it easy to use
the power amplifier of theE-213 on its own.

Two sets ofo v e r s i z es p e a k e rterminals areprovided which
acceptalso
heavy-gauge
speaker cable.

Option Boards
Other Featuresn Digital input and analog phono input canbe implemented via option board
n Analog peak power meters
n High-quality volume control. Supplied
remote commander allows source
switching and volume adjustment

Digital Input Board

The following three types of option boards are available
for the E-213: Digital Input Board DAC-10, Analog Disc
Input Board AD-9, and Line Input Board LINE-9.
Choose the board according to the intended usage, andinstall it in the convenient rear-panel slot. (Only oneboard can be used at a time.)n “High Carbon” cast iron insulator feet withsuperior damping characteristics furtherenhance sound quality

m The Analog Disc Input Board AD-10 and Line Input Board
LINE-10 can also be used.

DAC-10The board features an MDS (Multiple Delta Sigma)
D/A converter and has inputs for coaxial and opticalfiber connections.
A CD player, MD or DAT recorder or other component
with digital output (sampling frequency range 32 - 96
kHz, 24 bit) can be connected to the board, for highquality music reproduction.

Analog Disc Input Board

AD-9This board contains a high-performance, high-gain
phono equalizer.

n Loudness compensator restores naturalbalance at low listening levels

m Internal DIP switches control MM/MC operation, MC input
impedance, and subsonic filter on/off.

18

MM

Gain:
Input impedance:

36 dB
47 kilohms

MC

Gain:
Input impedance:

62 dB
10/30/100 ohms
(selectable)

161412LOUDNESS COMPENSATOR : ON10

Response in dB

8642Line Input Board

0LINE-9-20dB : Volume Attenuation at -20dB-4-610

This option board provides an additional set of
conventional line inputs which can be used to connect aCD player, tuner, or other component with analog output.

0dB : Volume Attenuation at -30dB
1001k
Frequency in Hz

10k100k

Compensator characteristics

DAC-10The photo shows an option board installation example.

n Front panel

GUARANTEED SPECIFICATIONS[Guaranteed specifications are measured according to EIA standard RS-490.]m Continuous Average Output Power (both channels driven, 20 – 20,000 Hz)
115 watts per channel into 4 ohms
105 watts per channel into 6 ohms
90 watts per channel into 8 ohms
m Total Harmonic Distortion (both channels driven, 20 – 20,000 Hz)
0.04%, with 4 to 16-ohm loadm Intermodulation Distortion 0.01%
m Frequency Response

20 – 20,000 Hz
0,–0.2 dB(for rated continuous average output)
2 – 150,000 Hz
0,–3.0 dB(for 1 Watt output)
HIGH LEVEL INPUT: 20 – 20,000 Hz
0,–0.2 dB(for rated continuous average output)m Damping Factor

100 (with 8-ohm load, 50 Hz)

POWER INPUT:

m Input Sensitivity, Input Impedancen Rear panel

Input

Option board
mounting slot

HIGH LEVEL INPUTBALANCED INPUTPOWER INPUT

Sensitivity
For rated output
For 1 W output (EIA)
213 mV
22.5 mV
213 mV
22.5 mV
1.07 V

Input
impedance
20 kΩ
40 kΩ

113 mV20 kΩ

m GainHIGH LEVEL INPUTPOWER INPUT

m Tone Controls

Turnover frequency and adjustment range
BASS:
300 Hz±10 dB (50 Hz)
TREBLE:
3 kHz±10 dB (20 kHz)m Loudness Compensation+6 dB (200 Hz) (Volume control setting –30 dB)

m Attenuator– 20 dB➝➝

OUTPUT:OUTPUT:

42 dB28 dB

m Signal-to-Noise Ratio
Input★

A Input selector
LINE-BAL LINE CD TUNER OPTIONB Left/right channel output meters(dB scale, direct-reading scale)
C Volume control
D Power switch
E Speaker selector OFF A B A+B
F EXT PRE (preamplifier/power amplifier separation)
ON/OFF switch
G Recording output selector
REC OFF SOURCE PLAY
H Stereo/mono button
I Loudness compensator switch

J Tone control ON/OFF button
K Bass control
L Treble control
M Balance control
N Attenuator button
O Headphone jack
P Line inputs (unbalanced)
Q Line inputs (balanced)
R Recorder REC/PLAY jacks
S Power amplifier inputs
T Left/right speaker output terminals A/BU
21 AC inlet★

Remarks★ This product is available in versions for 120/230 V AC. Make sure that the voltage shown on therear panel matches the AC line voltage in your area.
★ The shape of the AC inlet and plug of the supplied power cord depends on the voltage rating anddestination country.

n Supplied accessories:

HIGH LEVEL INPUTBALANCED INPUTPOWER INPUT
m Power Level Meters

Input shorted (A weighting)
S/N ratio at rated outputEIA S/N

110 dB
92 dB
123 dB

81 dB
81 dB
100 dB

Logarithmic compression, peak reading meters (Output dB / % scale)m Load Impedance

4 - 16 ohms

m Stereo Headphones

Suitable impedance: 8 – 100 ohms

m Power Requirements

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

m Power Consumption

43 Watts idle
230 Watts in accordance with IEC-60065

m Maximum Dimensions

Width 475 mm
Height 150 mm
Depth 422 mm

m Mass18.8 kg (41.4 lbs) net
23.0 kg (50.7 lbs) in shipping carton(18-11/16”)(5-7/8”)(16-5/8”)

m Supplied Remote Commander RC-23
Remote control principle: Infrared pulse
Power supply:
3 V DC (IEC R6 batteries × 2)
Maximum dimensions:
45 (W) × 136 (H) × 18 (D) mmWeight:
85 g (including batteries)• AC power cord
• Remote Commander RC-23• Specifications and design subject to change without notice for improvements.

http://www.accuphase.com/C0505Y

PRINTED IN JAPAN 851-0145-00 (AD1)