INTEGRATED STEREO AMPLIFIER● AAVA volume control ● Power ampliﬁcation stage conﬁgured as instrumentation
ampliﬁer ● Four-fold parallel push-pull conﬁguration of power transistors driven in Class
AB ● High power output of 180 watts into 8 ohms / 260 watts into 4 ohms ● High damping
factor of 800 ● Strong power supply with massive high-eﬃciency toroidal transformer andhigh-voltage, large ﬁltering capacitors ● Protection circuitry using MOS-FET switchesAn integrated amplifier crafted from separate amplifier technologies
The E-4000 integrated amplifier has emerged from separate amplifier technologies. The preamplifier section features
AAVA using ANCC to allow for volume adjustments that maintain high levels of vibrancy. The power amp section
employs balanced transmission utilizing the instrumentation amplifier principle to drive noise suppression to its limit.
The E-4000 is equipped with a four-fold parallel push-pull configuration of power transistors driven in Class AB in
the output stage to extract every last ounce of potential from the speakers and create soundscapes filled with subtlety.

Innovation – At the leading edge of technology■ AAVA volume control circuit■ Drastic reduction of distortion and noise

Conventional preamplifiers use variable resistors to adjust volume,
which causes contacts to deteriorate and create grit as well as
increase noise at normal volume levels. AAVA, however, produces
multiple, widely varying signals from the input signal and controls
volume by changing the combination of those signals. This achieves
minimum noise levels at all volume levels without any grit.

ANCC: Accuphase Noise and distortion Cancelling Circuit
The E-4000 uses ANCC topology for the I-V converter amplifier.
This innovative topology adds a sub-amplifier for effectively cancelingnoise in the main amplifier circuit. The use of low-noise technology
in the sub-amplifier (noise density: 1.5 nV / √Hz) further enhances
the benefits of ANCC. By
incorporating ANCC in theβI-V converter amplifier andFeedback circuit
the balanced amplifier ofOutput
the AAVA section, a further Input−A
Main amplifier
drastic reduction in noise
Distortionand noiseis achieved, especiallycanceling
Avcircuitat low to medium volume
Sub-amplifier
level positions.
for cancelation

AAVA volume control board

Block diagram of ANCC

■ Balanced remote sensing■ Instrumentation amplifier
With balanced circuits in the signal
input section, the amplification
stage is comprised entirely of an
instrumentation amplifier principlethat equalizes input impedanceon the + and – sides, for excellent
external noise suppression, andproviding optimal circuitry for thishigh-end audio amplifier.

＋+–+Input–＋Speaker
terminals–−

Signalfeedback＋

Input
−−+

Signal input section

Balanced remote sensing
improves damping factor
by feeding back the GND
at the same time as thesignal is output from thespeaker terminals.

Poweramplification
GND
feedback

Signal sensing
point(closest speaker terminal)＋GND sensing
point(closest speaker terminal)−Poweramplification section

Sound quality – Simply aiming for the best
■ Robust power amplification stage
The power amplification stage on both the left and right sides is equipped witha large heat sink and employs four-fold parallel push-pull power transistors
driven in Class AB to provide rated, high-power output of 180 watts into 8 ohms
and 260 watts into 4 ohms.

Toroidal transformers■ High damping factor brings out the full potential of the loudspeakers
The damping factor represents the amplifier’s ability to drive the speakers. A damping
factor of 800 (guaranteed) extracts the maximum potential from the loudspeakers.

■ Power supply circuitry designed for optimum stability
A strong power supply featuring a massive toroidal transformer and two high-voltage,large filtering capacitors (40,000 μF/80 V) offers a stable power supply at all times.

Massive toroidal transformerL-ch poweramplifier

Power amplifier section
Large filtering capacitors

Power transistors

Speakerterminals

Filtering capacitors

R-ch poweramplifier

Advanced Features■ AAVA volume control circuit■ Highly reliable logic-control signal switching relays■ Power amplification stage configured as instrumentation amplifier■ Current feedback amplification circuit topology
assures excellent phase characteristics in high range■ Preamplifier output connectors (LINE / BALANCED)■ Dedicated, high-quality headphone amplifier■ Volume attenuator that can instantly reduce soundas low as –20 dB■ Speaker output selector ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・①■ Tone controls using summing active filters ・・・・・・・②■ Individual phase setting for each input ・・・・・・・・・・・・③■ Stereo signal can be switched to monophonic operation・・・④■ Loudness compensator to adjust audible sonic balance・・・⑤■ DAC input selector (when DAC-60 / DAC-50 /DAC-40 is installed)・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑥■ MC/MM selector (when AD-50 / AD-30 / AD-20 is installed)・・・⑦■ Display mode selector ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑧■ Left/right balance control through AAVA ・・・・・・・・・・⑨■ Input selector for power amplifier section (LINE / BALANCED)・・・⑩■ Recorder selector ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑪■ Five sets of LINE input connectors ・・・・・・・・・・・・・・・・・⑫■ Speaker output protection circuit guards against
short-circuiting ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑬■ Two sets of balanced line inputs・・・・・・・・・・・・・・・・・・・・・⑭■ Two sets of large speaker terminals・・・・・・・・・・・・・・・・・⑮■ Volume display ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑯■ Sampling frequency display ・・・・・・・・・・・・・・・・・・・・・・・・・・⑰(when DAC-60 / DAC-50 / DAC-40 is installed)■ Highly reliable MOS-FET switches ・・・・・・・・・・・・・・・・・・⑱■ High-carbon cast iron insulators for superior
vibration damping・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑲
A highly-sensitive,
large analog power
meter capable ofdisplaying output
levels to –50 dB

Includes CD player
operationSupplied RemoteCommander
RC-250③①⑥②⑦④⑤⑧⑨⑩⑪⑫ Line input and output connectors⑬ Protection circuit assembly⑭ Balanced input and output connectors⑮ Speaker terminals connected
directly to protection circuitry⑯ Volume display⑰ Sampling frequency
display⑱ MOS-FET switches⑲ High-carbon cast iron insulators

Bi-amping for Further Enhanced Sound

Option Boards

In a bi-amped setup, the speaker units for the Low frequencyrange and the High frequency range are driven by separate
amplifiers with equal gain, enabling playback with evenhigher sound quality.
Left speaker
Right speaker

The rear panel expansion slots allow useof three types of option boards (DAC-60,AD-50, LINE-10). Up to two boards canbe installed, according to requirements.

＊The speakers must havea built- in crossovernetwork and separate
inputs for the Low andHigh ranges.
＊The example shows asetup with an additional
power amplifier for theLow frequency range.

＋ ○− ○− ○＋○HIGH

LOW− ○＋ ○− ○＋○HIGH

LOW

DAC-60Line Input
Board

Option board installation example
LEFT

Cartridge
Gain
Input
Impedance

LINE-9LEFT

Fiber-optic cable

RIGHT

T V＊

− ＋ − ＋USB cable
To INPUT
CD player

DAC-60Power amplifier＊：Set TV digital audio outputs to
PCM signals.

PC

Signal Sampling frequencies Number of bits
2.8 MHz
5.6 MHz11.2 MHz
DSD
1-bit
USB
11.2 MHz:ASIO only
PCM 32 to 384 kHz 32-bit
OPTICAL PCM 32 to 96 kHz
24-bitCOAXIAL PCM 32 to 192 kHz 24-bit

Front Panel

Provides anadditional
set of unbalanced line
level inputs.

LINE-10Rear Panel

Level /Function
Remotesensor frequency display display* See the previous page for
information on the controls
in the sub panel.

Line input board LINE-10

High-performance DAC with two
ES9016K2M chips from ESS
Technology driven in parallel.
Input

Coaxial digital cable
From PRE OUT

MCMM66 dB
40 dB
30 ohms
100 ohms 47 kilohms
300 ohms

AD-50

DAC-60Digital component

Power meters● Subsonic filter

DAC-50 / DAC-40 /DAC-30 / DAC-20 /DAC-10Digital Input Board− ＋ − ＋Power switch● Load impedance selection (MC only)

Analog Record AD-30 / AD-20 /Input Board
AD-10 / AD-9

AD-50

Connection example

Input selector● Supports MC and MM cartridges

boards can also be used:Digital Input
Board

AD-50Features a high-performance phonoequalizer for playback of analog records.

■ The following option

RIGHT

E-4000

Analog Record Input Board

Button for opening
the sub panel

Volumecontrol

Headphonejack

Attenuator on/offbuttonLine input connectors
TUNER / CD / LINE 1, 2, 3

Recorder input / output
Preamplifier output
Power amplifier input
connectors PLAY / REC connectors PRE OUT (LINE) connectors MAIN IN (LINE)Phase
AC powerselector
supply connector
Preamplifier
output connectors Power amplifier Speaker terminals A / B (2 sets)
PRE OUT (BAL) input connectors
Max.
MAIN IN (BAL) Supported
16 mm
spadelug(0.63 )
Balanced input connectors
dimensions Min. 7 mm (0.28 )BAL CD / BAL

Option board
installation slots

Guaranteed Specifications
Rated Output
Both channels driven(20 to 20,000 Hz, 0.05%)
Total Harmonic Distortion
Both channels driven(20 to 20,000 Hz)
Intermodulation Distortion
FrequencyResponseDamping Factor
Input Sensitivity

Input Impedance
Max. Input Voltage
Output Voltage
Output ImpedanceGain4-ohm load *8-ohm load

260 W / ch
180 W / chTone Controls

4 to 16-ohm load

0.05%

Loudness
Compensator

0.01%
INPUT (BALANCED / LINE) 20 to 20,000 Hz (0, –0.5 dB)
At rated output
MAIN IN (BALANCED / LINE) 20 to 20,000 Hz (0, –0.2 dB)
At 1 W output
MAIN IN (BALANCED / LINE) 3 to 150,000 Hz (0, –3.0 dB)
800
INPUT (BALANCED / LINE)
190 mVAt rated output
MAIN IN (BALANCED / LINE)
1.51 VINPUT (BALANCED / LINE)
14.2 mVEIA(at 1 W output)
MAIN IN (BALANCED / LINE)
113 mVINPUT (BALANCED)
40 kilohms
INPUT (LINE)
20 kilohms
MAIN IN (BALANCED)
40 kilohms
MAIN IN (LINE)
20 kilohms
INPUT (BALANCED / LINE)
5.0 V
At rated output
PRE OUTPUT (BALANCED / LINE)
1.51 VAt rated output
PRE OUTPUT (BALANCED / LINE)
50 ohms
INPUT (BALANCED / LINE) ĺ PRE OUTPUT (BALANCED / LINE)
18 dB
MAIN IN (BALANCED / LINE) ĺ SPEAKER OUTPUT
28 dB

Attenuator
At rated output(Input shorted,S/N A weighting)
Ratio
EIA
Power Meters
Stereo Headphones

PowerRequirements
PowerConsumption

Maximumdimensions
MassTurnover frequency
and adjustment range

Bass: 300 Hz
Treble: 3 kHz±10 dB±10 dB+6 dB (100 Hz)–20 dBINPUT (BALANCED)
102 dBINPUT (LINE)109 dB
MAIN IN (BALANCED / LINE)125 dBINPUT (BALANCED / LINE)
97 dB
MAIN IN (BALANCED / LINE)
101 dB
Logarithmic type peak level display of output in dB or %Compatible impedance
8 ohms or higher
120 V, 220 V, 230 V AC (voltage as indicated on rear panel)
50 / 60 Hz
Idle
54 W
In accordance with IEC 62368-1
248 W
Stand-by
0.3 W
Width 465 mm (18.3”) × Height 181 mm (7.1”) × Depth 428 mm (16.9”)
Net
In shipping carton

24.9 kg (54.9 lbs)
31 kg (69 lbs)*: Limited to music signals

Supplied accessories● AC power cord

● Remote Commander RC-250

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.
★ The 230 V version has an Eco Mode that switches power off after 120 minutes of inactivity.
★ The shape of the plug of the supplied AC power cord depends on the voltage rating and destination country.

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

https://www.accuphase.com/K2205Y

850-2233-00（B1） PRINTED IN JAPAN