Class-A

PRECISION INTEGRATED STEREO AMPLIFIER● Integrated amplifier with fully balanced configuration from input to output● Balanced AAVA type volume control ● High-accuracy, high-rigidity volume sensor
construction ● Power amplification stage configured as an instrumentation amplifier● Four-fold parallel push-pull configuration using power MOS-FETs driven in Class A● Linear power output of 35 watts into 8 ohms, 70 watts into 4 ohms, or 140 watts into2 ohms ● 160 W output into 1-ohm load (music signals) ● High damping factor of1,000 ● Strong power supply with massive high-efficiency toroidal transformer
and large filtering capacitors ● Protection circuitr y using MOS-FET switchesAn integrated amplifier crafted from the technology used in our flagship model
The E-700 is an evolutionary integrated amplifier that incorporates numerous technologies from our 50th
anniversary flagship model, the E-800. The preamplifier section uses a Balanced AAVA type volume control
with ANCC to create a balanced configuration from input to output and achieve driving perfection.
The power amp stage that drives the speakers has been fortified from three elements to four, further increasing
reliability. Experience the full breadth of emotion in live performances with the E-700’s superior expression.

Innovation – At the leading edge of technology■ Balanced AAVA type volume control circuit
Conventional preamplifiers use variable resistors to adjust volume, whichcauses contacts to deteriorate and create grit as well as increase noise atnormal volume levels. AAVA, however, produces multiple, widely varying
signals from the input signal and controls volume by changing thecombination of those signals. This achieves minimum noise levels at allvolume levels without any grit. The E-700 relies on Balanced AAVA
comprised of balanced AAVA circuits, reducing the overall noise level by
10% compared to conventional models at typical volume positions.

■ ANCC significantly reduces distortion and noise(Accuphase Noise and distortion Canceling Circuit)

The E-700’s I-V conversion amplifier uses the ANCC principle.
ANCC uses a secondary amplifier to cancel out noise anddistortion from the main amplifier. The secondary amplifier utilizes
a low-noise amplifier (noise density: 1.5 nV/√Hz) to increase theeffect of the ANCC. Incorporating this ANCC in the AAVA I-V
conversion amplifier
drastically improves
βnoise performance,
Feedback circuit
particularly when
Output−Atransitioning from Input
Main amp
Distortion
low volume settingsand noiseAvcanceling
to typical volume
circuitpositions.
Cancellation circuits via
a secondary amplifier

Balanced AAVA type volume control circuit■ High-accuracy, high-rigidity volume sensor construction
The volume sensor mechanism
carved from a single aluminum
block ensures silky-smooth
operation, a weighty operationalfeel, and accurate position
detection. Operations with theremote commander are so quiet
that mechanical noise is hardly
noticeable.

Block diagram of ANCC

■ Power amplification stage configured as an instrumentation amplifier
The instrumentation amplifier ＋
circuitry’s equal impedanceon the + and – sides andexceptional external noise Input
suppression provide optimal
performance for an audio
amplifier.
−+–+––−+Signal input
sectionVolume sensor construction＋Speaker
terminals

Power amplification
sectionSound quality – Simply aiming for the best
■ Power amplification stage that achieves linear outputThe power amplification stage on both the left and right sides features a large heat sink andemploys four-fold parallel push-pull power transistors driven in Class A to provide linear
power output of 35 watts into 8 ohms, 70 watts into 4 ohms, and 140 watts into 2 ohms.

■ High damping factor brings out the full potential of speakers
The damping factor represents the amplifier’s ability to drive the speakers.
A damping factor of 1,000 (guaranteed) extracts the maximum potentialfrom the loudspeakers.
Toroidal transformer■ Power supply circuitry delivers steady power
A strong power supply featuring a massive toroidal transformer and two
high-voltage, large filtering capacitors (56,000 μF/50 V) offer a stable
power supply at all times.

Massive toroidal transformer

Large filtering capacitors

Power amplifier section
Power MOS-FET switches

L-ch power
amplifierFiltering capacitors

R-ch power
amplifierAdvanced Features■ Balanced AAVA volume control circuit■ High-accuracy, high-rigidity volume sensor construction■ Highly reliable logic-control signal switching relays■ Power amplification stage configured as aninstrumentation amplifier■ Balanced remote sensing to improve the damping factor■ Current feedback amplification circuit topology assures
excellent phase characteristics in the high range■ Preamplifier I/O terminals (LINE / BALANCED)■ Dedicated, high-quality headphone amplifier■ –20 dB volume attenuator to instantly reduce the sound level■ 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■ Display mode selector ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑥■ DAC input selector (when DAC-60 / DAC-50 /DAC-40 is installed)・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑦■ MC/MM selector (when AD-60 / AD-50 / AD-30 /AD-20 is installed)・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑧■ Subsonic filter ON/OFF selector (when AD-60 is installed) ・・・⑨■ MC input impedance selector・・・・・・・・・・・・・・・・・・・・⑩, ⑯30 ohms / 100 ohms / 200 ohms / 300 ohms (when AD-60 is installed)■ Left/right balance control using AAVA ・・・・・・・・・・・・・⑪■ Power amplification input selector (LINE / BALANCED)・・・⑫■ Recorder selector ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑬■ Volume display・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑭■ Sampling frequency display ・・・・・・・・・・・・・・・・・・・・・・・・・・⑮(when DAC-60 / DAC-50 / DAC-40 is installed)■ Five sets of line inputs・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑰■ Speaker output protection circuit guards against
short-circuiting ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・⑱■ Two sets of balanced inputs ・・・・・・・・・・・・・・・・・・・・・・・・・・⑲■ Two sets of large speaker terminals・・・・・・・・・・・・・・・・・⑳■ Highly sensitive LED power meters capable ofdisplaying output levels to –50 dB・・・・・・・・・・・・・・・・・・・㉑■ Highly reliable MOS-FET switches・・・・・・・・・・・・・・・・・・・㉒■ High-carbon cast iron insulators for superior
vibration damping・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・㉓①②⑦⑭ Volume display

③④

⑤⑧

⑨⑩

Supplied RemoteCommanderRC-250⑪⑮ Sampling frequency display⑫⑬⑯ MC input impedance display⑰ Line input/output connectors⑱ Protection circuit assembly⑲ Balanced input/output connectors⑳ Speaker terminals connected
directly to protection circuitry㉑ Power meter
Includes CD playeroperation⑥㉒ MOS-FETswitches㉓ High-carbon castiron insulators

Bi-amping for Further Enhanced SoundOption Boards

In a bi-amped setup, the speaker units for the Low range
and the High range are driven by separate amplifiers withequal gain, enabling playback with higher sound quality.

The rear panel expansion slots allow use of
three types of option boards: DAC-60, AD-60,and LINE-10. The E-700 can accommodate
two boards according to the requirements.

Left speaker＊The speakers must havea built- in c ros sovernetwork and separate
inputs for the Low andHigh ranges.
＊The example shows asetup with an additional
power amplifier for theLow range.

Right speaker＋ ○− ○− ○＋○HIGH− ○＋ ○− ○＋○LOW

HIGH

LOW

DAC-60Line Input
BoardCartridge
Gain

LINE-9Input
Impedance
AD-60

DAC-60Digital component

From PRE OUT

LEFTFiber-optic cable

RIGHT− ＋ − ＋T V＊

USB cable
To INPUTDAC-60 ＊ Set TV digital audio outputs toPCM signals.

Power amplifier

Volumedisplay

Line Input Board LINE-10

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

PCSignal Sampling Frequencies Number of Bits
2.8 MHz
5.6 MHz11.2 MHzDSD1-bit
USB
11.2 MHz:ASIO only
PCM 32 to 384 kHz 32-bit
OPTICAL PCM 32 to 96 kHz24-bit
COAXIAL PCM 32 to 192 kHz 24-bit

Front Panel
Remotesensor

MCMM
66 dB
40 dB
30 ohms
100 ohms
200 ohms 47 kilohms
300 ohms

Provides anadditional
set of unbalanced line
level inputs.

Input

Coaxial digital cable

Input selector● Subsonic filter

DAC-50/DAC-40/
DAC-30/DAC-20/
DAC-10Digital Input Board
Connection example

Bar graphpower meters● Load impedance selection (MC only)

Analog Record AD-50/AD-30/
AD-20/AD-10/AD-9
Input Board

AD-60

Option board installation example
LEFT− ＋ − ＋CD player● Supports MC and MM cartridges■ The following option boards canDigital Input
Board

AD-60

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

also be used

RIGHT

E-700

Analog Record Input Board

LINE-10

Rear Panel
Function
display

Volumecontrol

Power switch * See the previous page for Open button Attenuator Headphone
buttonjack
information on the controls
in the sub panel.

Line input connectors
Recorder input / output
TUNER / CD / LINE 1, 2, 3 connectors PLAY / REC

Option board
installation slots

Preamplifier line output
connectors PRE OUT

Phaseselector

Power amplifier line input
connectors MAIN IN

AC power
supply connector

Balanced preamplifier Balanced power
Speaker terminals A / B
output connectors amplifier connectors
Max.
PRE OUT (BAL)
MAIN IN (BAL)
Supported16 mm
spade lug
(0.63 )
dimensions
Min. 7 mm
Balanced input connectors(0.28 )BAL CD / BAL

Guaranteed Specifications
Rated Output(20 to 20,000 Hz)
Total Harmonic Distortion(20 to 20,000 kHz,rated output)

1-ohm load *2-ohm load *4-ohm load *8-ohm load

160 W/ch
140 W/ch
70 W/ch35 W/ch

2 to 4-ohm load

0.05 %

8 to 16-ohm load

0.03 %

Intermodulation Distortion

0.01 %
INPUT (BALANCED / LINE)
20 to 20,000 Hz (0, –0.5 dB)
MAIN IN (BALANCED / LINE)
20 to 20,000 Hz (0, –0.2 dB)
MAIN IN (BALANCED / LINE)
3 to 150,000 Hz (0, –3.0 dB)
Damping Factor
1,000
INPUT (BALANCED / LINE)
83.9 mVAt ratedoutput
MAIN IN (BALANCED / LINE)666 mV
Input Sensitivity
INPUT (BALANCED / LINE)
14.2 mVEIA(at 1 W output)
MAIN IN (BALANCED / LINE)
113 mVINPUT (BALANCED)
40 kilohms
INPUT (LINE)
20 kilohms
Input Impedance
MAIN IN (BALANCED)
40 kilohms
MAIN IN (LINE)
20 kilohms
Max. Input Voltage
INPUT (BALANCED / LINE)
5.0 V
0.666 V
Output Voltage At rated output PRE OUTPUT (BALANCED / LINE)
Output Impedance
PRE OUTPUT (BALANCED / LINE)
50 ohms
INPUT (BALANCED / LINE) ĺ PRE OUTPUT (BALANCED / LINE)
18 dB
Gainĺ
MAIN IN (BALANCED / LINE) SPEAKER OUTPUT
28 dB
Frequency
Response

At ratedoutput
At 1 W output

Supplied accessories● AC power cord

Tone Controls
Loudness Compensator
Attenuator
S/NRatio

At rated output(Input shorted,A weighting)
EIAPower Meters
Headphones JackPower
Requirements
Power
Consumption
Maximum
Dimensions
Mass

Bass: 300 Hz±10 dB
Treble: 3 kHz±10 dB+6 dB (100 Hz)–20 dBINPUT (BALANCED)
103 dBINPUT (LINE)103 dB
MAIN IN (BALANCED / LINE)117 dBINPUT (BALANCED / LINE)
97 dB
MAIN IN (BALANCED / LINE)
101 dBBar graph meters, Output voltage (dB) using 26 points,
with ON/OFF switch
Compatible impedance
8 ohms or higher
120 V, 220 V, 230 V AC (voltage as indicated on rear panel)
50 / 60 HzIdle
178 W
In accordance with IEC 62368-1
220 W
Stand-by
0.3 W

Turnover frequency
and adjustment range

Width 465 mm (18.3”) × Height 191 mm (7.5”) × Depth 428 mm (16.9”)
Net
In shipping carton

24.9 kg (54.9 lbs)
32 kg (71 lbs)

＊ Music signals only
Measurement methods for Guaranteed Specifications adhere to JEITA CP-1301A and IEC 60268-3.

● 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/C2405Y

850-2232-00（B1） PRINTED IN JAPAN