m Revolutionary AAVA volume control m Output stage with triple parallel push-pull
power MOS-FETs m Instrumentation amplifier principle for power amplifier input
stage allows fully balanced signal transmission and enhances current feedback andMCS+ topology m Logic-control relays for straight and short signal paths m Robust
power supply with large high-efficiency toroidal transformer and high filtering capacity
m EXT PRE button allows separation of preamplifier and power amplifier stage

The Ultimate Pure Class A Integrated Amplifier – Innovative AAVA volume controland triple parallel push-pull power MOS-FET arrangement in output stage. Poweramplifier stage features latest instrumentation amplifier configuration for balanced
signal transmission. Current feedback design combined with further improved MCS+
topology results in excellent high-range phase characteristics. Massive power supply
delivers as much as 150 watts per channel (music signal) into loads as low as 1 ohm.
The integrated amplifiers from Accuphase
operating in full class A enjoy an excellent
reputation both in Japan and overseas fortheir outstanding musical qualities. The E-560
represents a model change from the popular
E-550. While incorporating the sophisticatedtechnological know-how gained by Accuphaseover the years, it features a further refined
AAVA volume control and uses the latest circuit topology and strictly selected parts of theutmost quality. The E-560 is destined to become the new reference model for high-class
integrated amplifiers.
AAVA is a revolutionary principle designed forcuit topology and the highly acclaimed current
feedback principle, this makes for even better
electrical characteristics. In the output stage,high-power MOS-FET devices renowned fortheir great sound and utter reliability are arranged in a triple parallel push-pull configuration per channel. MOS-FETs have excellent
frequency response and high input impedance
which reduces the load on the preceding driverstage. They also have perfect thermal stability.
By driving these devices in class A, the amplifier becomes capable of reproducing even themost delicate details in the music source withintriguing suppleness and utmost fidelity.

high performance and ultimate sound. It integrates the amplification and volume control
tasks in a single electronic entity that uses
analog processing and eliminates all variable
resistors from the signal path. Its performanceand sonic purity do not deteriorate over theyears, providing excellent reliability. The AAVA
version in the E-560 takes the principle to thenext level, delivering the same peerless performance in a more compact form factor.
The power amplifier section is built as an advanced instrumentation amplifier, which enables
fully balanced signal transmission throughout.
Together with the further improved MCS+ cir-AAVA (Accuphase Analog Vari-gain Amplifier) Volume Control
AAVA is a radically different volume control principle that eliminates all variable resistors from the signal path and provides top-notch
performance and sound quality. Because the music signal is not affected by changes in impedance, high signal-to-noise ratio and low
distortion are maintained at any volume control setting.

n Volume control resolution

n AAVA means analog processing

AAVA adjusts the listening volume by means of 16 weighted V-I converter amplifiers
which are controlled by current switches. The number of possible volume steps set by
the combination of these converter amplifiers is 2 to the power of 16 = 65,536.

n Input buffer amps use 5-MCS topology

The AAVA circuit converts the music signal from a voltage into a current, switches
gain by means of current switches, and then reconverts the current into a voltage.
The entire process is carried out in the analog domain.

n Same operation feel as a conventional high-quality volume control

One of the factors that have a bearing on possible noise in an AAVA arrangement
is the input buffer design. By connecting five high-performance amps in parallel,excellent S/N ratio is assured.

n AAVA maintains high S/N ratio and uniform frequency response
Unlike with conventional volume controls, AAVA does not introduce a change inimpedance at any volume setting. Consequently, there is no deterioration of S/Nratio, and frequency response remains totally uniform. The benefits are especiallyapparent at settings that correspond to normal listening levels, because the tonal
quality is not altered in any way.

n No more left/right tracking differences or crosstalk

The volume control knob position is detected by a dedicated CPU which in turnselects the current switches for AAVA operation. Operating the knob therefore
feels exactly the same as with a conventional control, and as before, operation
via the remote commander is also possible.

n Attenuator and balance control also implemented by AAVA
The functions of the attenuator and the left/right balance control are coveredby the AAVA circuit as well, eliminating the need for additional circuit stages.
Keeping the configuration simple helps to maintain high performance andsonic purity.

n Display shows volume level as numeric value

Because AAVA is an electronic circuit employing fixed-value resistors, there is virtuallyno left/right tracking error also at low volume levels. Since channels can be kept
separate, crosstalk also does not present a problem.

The volume level (degree of attenuation) as set with AAVA is shown as a numericindication in the center of the front panel. The indication ranges from MAX (0 dB)
to MIN (lowest setting).
16 current switches(65,536 possible combinations)

AAVA configuration in E-560

AAVA operation principle
The music signal is converted into 16 types
of weighted current by V-I (voltage - current)
converting amplifiers [1/2, 1/22, ... 1/215, 1/216].
The 16 currents are turned on or off by 16 current switches, and the combination of switch
settings determines the overall volume. Theswitching operation is controlled by a CPU according to the position of the volume control
knob. The combined signal current forms avariable gain circuit that adjusts the volume.
Finally, the combined current is converted
back into a voltage by an I-V(current - voltage) converter.

I-V Converter
Reconversion ofcurrent into voltage

INPUT

BufferCurrent values
are added

5-MCSOUTPUT

Input music signal

CPU
V-I Converter
Conversion 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
Volume knob is turnedand position is detectedn AAVA volume control assemblywith higher integration densityof components and circuitry.

n CPU assembly which controls AAVA and various otherfunctions.

n Supplied remote commander RC-200
Allows volume adjustment and input
source switching.
MCS+

Multiple Circuit
Summing-up

Biasstabilizer
REGULATOR+ INPUTNFBNETWORKBiasstabilizer

GAIN CONTROLCIRCUITNFBNETWORKOUTPUTBiasstabilizer

Biasstabilizer- INPUTREGULATORn Power amplifier assembly and output

Biasstabilizer

stage with triple parallel push-pull power
MOS-FETs directly mounted to large heat sink.

n Power MOS FETs in triple paral-lel configuration operating in pureclass A deliver guaranteed linear
power: 120 watts/channel into 2ohms, 60 watts/channel into 4 ohms
or 30 watts/channel into 8 ohms.
n Instrumentation amplifier principle
in power amplifier section allows
fully balanced signal paths. Current
feedback design ensures outstanding high-range phase characteristics, together with further improved MCS+ topology.
n Tone controls using active filters for optimum sound quality.
n Dedicated headphone amplifier optimized
for sound quality.
n Loudness compensator for enhanced bass
at low listening levels.
n Versatile array of inputs with two balanced inputs to shut out external noise interference.
n Logic-controlled relays assure high soundquality and long-term reliability.
Gold-plated input/output jacks connected directly to relays

Circuit diagram of E-560 power amplifier (one channel)

n Power supply with massive highefficiency toroidal transformer andlarge filtering capacitors provides
ample reserves.

n Individual phase setting supported
for each input position.

n Analog peak power meters forPower MOS-FETs

monitoring output levels.

n Two sets of large-size speakerterminals accept also Y lugs.

Toroidal power transformer

Filtering capacitorsn Two option board installation
slots provide further versatility. With AD-20 board, MC/MMswitching on E-560 front panel ispossible.

n EXT PRE switch and power
amplifier input connectors allow
independent use of power amplifier section.
Large speaker terminals

Connection Example For Bi-amping Setup
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.
Left loudspeaker

Right loudspeaker

The speakers musthave a built-in crossovernetwork and separate
inputs for LOW andHIGH range.
The example shows asetup with an additional
amplifier for the highfrequency range.

LOWHIGH

LOW

HIGH

Option Boards

Digital Input Board

Three types of option boards can be used in the E-560:
the Digital Input Board DAC-20, Analog Disc Input Board
AD-20, and Line Input Board LINE-10. These boards canbe installed in the rear-panel slots as required.

DAC-20m It is possible to install two identical boards.

This board features an MDS (Multiple DeltaSigma) ++ type D/A converter and allows
direct digital connection of a CD player, MD orother component with digital output (samplingfrequency up to 96 kHz, 24 bits), for high-quality
music reproduction.

m The Analog Disc Input Board AD-9/AD-10 and the Line Input
Board LINE-9 can also be used.

m Inputs for coaxial and optical fiber connections are provided.

m When using the AD-9/AD-10, the MC/MM button of theE-560 has no effect. MC/MM switching must be performedon the board.

Analog Disc Input Board

AD-20

This board serves for playback of analog records.
It contains a high-performance, high-gain phonoequalizer.
m MC/MM switching is possible on the front panel of theE-560.
m Internal DIP switches control MC input impedance andsubsonic filter on/off.

E-560

Gain

: 62 dBGain: 36 dB

Response in dB

MC Input impedance : 10/30/100 ohms (selectable)
MM Input impedance : 47 kilohms
From PRE OUT
Analogoutput

Line Input Board
To INPUT

CD player

LINE-10

This option board provides an additional set of
unbalanced line inputs.
Photo shows an example for
option board installation.

Power amplifier (A-35 or similar)

n Front Panel

Guaranteed Specifications[based on the EIA RS-490 test standard]m Rated Continuous Average Output Power (both channels operating simultaneously at 20 - 20,000 Hz)
150 W/ch 1-ohm load ( )120 W/ch 2-ohm load
60 W/ch 4-ohm load
30 W/ch 8-ohm load( ) These loads are for music signals only.
m Total Harmonic Distortion(both channels operating simultaneously at 20 - 20,000 Hz)
0.05%
2-ohm load
0.03%
4 to 16 ohm loadm IM Distortion

0.01% or lessm Frequency Characteristics HIGH LEVEL INPUT/POWER IN
20 - 20,000 Hz +0, –0.2 dB (for rated continuous average output)
3 - 150,000 Hz +0, –3.0 dB (for 1 watt output)m Damping Factor

200 (with 8-ohm load, 50 Hz)

m Input Sensitivity, Input Impedancen Rear Panel

Sensitivity
Input
For rated output For 1 W output (EIA) impedance
HIGH LEVEL INPUT 77.7 mV
14.2 mV
20 kΩ
BALANCED INPUT 77.7 mV
14.2 mV
40 kΩ
POWER IN
0.617 V113 mV
20 kΩ
Input

Pressing this button
opens the sub panel.

Option board
installation slots

m Output Voltage, Output Impedance
PRE OUTPUT: 0.617 V, 50-ohm(at rated continuous average output)m Gain
HIGH LEVEL INPUT → PRE OUTPUT: 18 dB→ OUTPUT:POWER IN
28 dB
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 (100 Hz)

m Attenuator–20 dBm Signal-to-Noise Ratio
Input shorted (A weighting)
S/N ratio at rated output
HIGH LEVEL INPUT
98 dB
BALANCED INPUT
93 dB
POWER IN
116 dBInput

A Input selector
J Attenuator button
K Headphone jack
B Function indicator LEDs
C Volume control
L Line inputs (unbalanced)
D Power switch
TUNER CD LINE 1, 2, 3
E Function buttons (A)M Recorder inputs and outputs
Speaker selector (A/B/OFF), Phase selector,
N Preamplifier outputs
Recording selector (ON/PLAY),
O Power amplifier inputs
Preamplifier/power amplifier separator (EXT PRE)P Left/right speaker output terminals A/B
F Bass control
Q CD/LINE inputs (balanced)
G Treble control
GroundInverted (–)
H Balance control
Non-inverted (+)
I Function buttons (B)R AC power connector
Tone control (ON/OFF), Meter operation (ON/OFF),MONO/STEREO selector, Volume level display (ON/OFF),
Loudness compensator, MC/MM selector

EIA S/N
93 dB
93 dB
98 dB

m Power Level Meters

Logarithmic compression, peak reading meters
Output dB/% scale

m Load Impedance

2 - 16 ohms

m Stereo Headphones

Suitable impedance:m Power Source

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

170 watts idle
270 watts in accordance with IEC 60065

m Maximum Dimensions

WidthHeightDepthm Mass24.0 kg (52.9 lbs) net
30.0 kg (66.1 lbs) in shipping carton

465 mm
191 mm426 mm

8 - 100 ohms

(18-5/16”)(7-1/2”)(16-3/4”)

Remarks
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.
The shape of the AC inlet and plug of the supplied power cord depends on the voltage rating and destination country.

n Supplied accessories:m AC power cordm Remote Commander RC-200

mSpecifications and design subject to change without notice for improvements.

http://www.accuphase.com

K0905YPRINTED IN JAPAN

851-0188-00 (B1)