INTEGRATED STEREO AMPLIFIER● Revolutionary AAVA volume control ● Output stage with high-powertransistors in parallel push-pull arrangement delivers high quality power: 100watts x 2 into 8 ohms ● Instrumentation amplifier principle for power amplifier
input stage allows fully balanced signal transmission ● Logic-control relays for
shortest signal paths ● Robust power supply with large high-efficiency
transformer and high filtering capacity ● Numeric indication of volume level

High class 100 W/channel (8 ohms) integrated amplifier
AAVA volume control principle ensures optimum sound quality and performance, with precise numeric indicationof volume level. Instrumentation amplifier principle in power stage enables fullybalanced signal transmission, combined with current feedback design. High-power transistors in parallel push-pull output stage, and power supply with massive high-efficiency
transformer and large filtering capacitors provide ample reserves for high output power.
The extremely well regarded E-300 series ofintegrated amplifiers occupies a central
position in the Accuphase lineup, and enjoys
enduring popularity both in Japan andabroad. The E-360 represents a full modelchange from the E-350, incorporating theAAVA volume control and other sophisticated technological know-how gained by
Accuphase over the years. Only strictly
selected high-grade materials and parts areused, resulting in an integrated amplifier thatbrings out the full potential of every source,
for a truly enchanting musical experience.
AAVA is a revolutionary principle that
redefines the concept of volume control fromthe ground up. Unlike the digital approach
involving A/D and D/A processing, it
operates purely in the analog domain forhigh performance and ultimate sound.
Because the music signal does not passthrough any variable resistors, it is not
subject to the adverse effects of impedancechanges. Adjusting the volume level isaccomplished practically without altering thesonic quality. As the amplification andvolume control tasks are integrated in asingle electronic entity without any variable
resistors, performance and sonic purity do
not deteriorate over the years, providing
excellent reliability. The selected volumelevel is clearly shown by the numeric display
in the center of the front panel, allowing theuser to set precisely the desired level everytime.
The power amplifier section is built as anadvanced instrumentation amplifier, whichenables fully balanced signal transmission
throughout. Together with the highlyacclaimed current feedback principle, thismakes for even better electrical characteristics. In the output stage, high-power audiograde transistors are arranged in a parallelpush-pull configuration which significantly
enhances drive capability of low-impedanceloads.
Outputoperationissustained by a massive transformer
and large filtering capacitors,
providing high-quality power outputof 140 watts x 2 into 4 ohms or 100
watts x 2 into 8 ohms.

■ Power amplifier unit with high-power transistors in parallel configuration delivers ample power: 140 watts/channel into 4 ohms or 100
watts/channel into 8 ohms.
■ Instrumentation amplifier principle in power amplifier section
allows fully balanced signal paths. Current feedback circuit
topology ensures outstanding high-range phase characteristics.
■ Hefty high-efficiency transformer and large filtering capacitors(22,000 µF x 2) provide ample reserves.
■ Redesigned NFB path results in minimized output impedance,
improved damping factor, and even better sound quality.
■ Analog peak power meters for monitoring output levels.
■ Tone controls using active filters for optimum sound quality.
■ Loudness compensator for enhanced sonic impact at low listening levels.
■ Two option board installation slots on rear panel.
■ Digital input and analog record playback can be realized via
option boards. With AD-20 board, MC/MM switching on
E-360 front panel is possible.

■ Output phase selectable individually for each input, withvisual indication. When INV LED is lit, output phase isinverted. When LED is out, phase is normal.
■ Dedicated headphone amplifier optimized for sound quality.

MC/MM selector EXT PRE button PHASE selector■ Logic-controlled relays assure high sound quality
and long-term reliability.
■ Versatile array of inputs with two balanced inputs
to shut out external noise interference.
■ "High Carbon" cast iron insulator feet with superior
damping characteristics further enhance sound quality.
■ Two sets of large-size speaker terminals accept Ylugs and enable speaker bi-wiring.

Line input and output connectors and balanced input connectors

Protection circuitassembly

Two sets of large speaker terminals+ B2Q7

Biasstabilizer

INPUT

Filtering capacitors■ EXT PRE button and preamplifier output/power
amplifier input connectors allow independent useof pre and power amplifier sections.

+ B3+–Large power transformer

Q9Q 11Q 13+ B1Q5
Q1

Q3

NFB
NETWORKNFBNETWORKNFBNETWORK

Q2–+OUTPUT

Biasstabilizer

Q4Q6
Biasstabilizer

Q 10Q8Q 12Q 14– B1– B2– B3Circuit diagram of E-360 power amplifier (one channel)

High power transistors■ Power amplifier assemblies forleft and right channel, withpush-pull power transistors directly

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.
■ Volume control resolution
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.

■ AAVA means analog processing
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.

■ Input buffer amps use 5-MCS topology
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.

■ Same operation feel as a conventional high-quality volume control
The volume control knob position is detected by a dedicated CPU which in turn selects thecurrent switches for AAVA operation. Operating the knob therefore feels exactly the same aswith a conventional control, and as before, operation via the remote commander is also possible.

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

■ Attenuator and balance control also implemented by AAVA
The functions of the attenuator and the left/right balance control are covered by theAAVA circuit as well, eliminating the need for additional circuit stages. Keeping theconfiguration simple helps to maintain high performance and sonic purity.

■ No more left/right tracking differences or crosstalk
Because AAVA is an electronic circuit employing fixed-value resistors, there is virtually no left/right tracking error
also at low volume levels. Since channels can be kept separate, crosstalk also does not present a problem.

■ Display shows volume level as numeric value
The volume level (degree of attenuation) as set with AAVA is shown as a numeric indicationin 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-360

1−21−
221−
23

INPUT＋BUFFEROUTPUT

Current values
are added

5-MCS
1−Input music signal

I -V Converter
Reconversionof current
into voltage

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. The switching operation iscontrolled by a CPU according to the position of the volume
control knob. The combined signal current forms a variable
gain circuit that adjusts the volume. Finally, the combined
current is converted back into a voltage by an I-V (current voltage) converter.
■ CPU assembly which controls AAVA and various other functions

215
1−216

V- I Converter

Conversion into current
with 16 weighting stages(1/2 - 1/216)

CPU

CPU detects position of volume
knob and operates current on/off
switches according to knob position■ Supplied remote commander RC-200
Allows volume adjustment and input
source switching.

output stage and parallel
mounted to large heat sink

VolumeBalance
Attenuator
Volume knob is turnedand position is detected■ AAVA volume control assembly withhigher integration density ofcomponents and circuitry

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, for even better sound quality.
Left loudspeaker

Right loudspeaker●The E-360 provides twoslots for option boardson the rear panel.

●Option boards can beused to implement directconnection of digital signals for high-quality music
playback, or to implement
high-quality playback ofanalog records.

● The speakers must have abuilt-in crossover networkand separate inputs for
LOW and HIGH range.
● The example shows asetup with an additional
power amplifier for thelow frequency range.

− ○＋ ○＋ ○−○− ○＋ ○
＋ ○
−○

HIGH

HIGH

LOW

RIGHT

E-360

Digital Input Board

Option Boards●LOW● COAXIAL: 75-ohm coaxial cable

Sampling frequency 32 kHz - 192 kHz, 24 bit resolution● OPTICAL: Optical fiber cable

Sampling frequency 32 kHz - 96 kHz, 24 bit resolution● USB:

It is possible to install two
identical boards in the slots.

DAC-30AD-20

Photo shows an example for option board installation.

Analog Disc Input Board

Coaxial digitalcable

Digital (S/PDIF) output● Internal DIP switches control MC input impedanceand subsonic filter on/off.

Digital equipment(up to 96 kHz/24 bit)

LEFT

USB cable

To INPUTB connector（ withup Typeto 96 kHz/24 bit （DAC-30

Power amplifier (P-4100, A-35 or similar)

ComputerwerwGain:36 dB

Line Input Board

LINE-10

This option board provides an additional setof unbalanced line inputs.

Connection example for DAC-30■ Front panel
q62 dB

MM Input impedance: 47 kilohms

RIGHT＋ − ＋ −Gain:

MC Input impedance: 10/30/100 ohms (selectable)

Optical fiber

CD player

AD-20● MC/MM switching is possible on the front panel of the E-360.

(up to 192 kHz/24 bit)

Analog output

USB cable (with Type B connector)
Sampling frequency 32 kHz - 96 kHz, 24 bit resolution

This board serves for playback of analog records. Itcontains a high-performance, high-gain phono equalizer.

LEFT− ＋− ＋From PRE OUT

DAC-30Features an MDS (Multiple Delta Sigma) ++ type D/Aconverter. The USB port allows connection to acomputer with a downloaded music library for playbackof high-resolution data with optimum sound quality.

E-360 Guaranteed Specifications[Guaranteed specifications are measured according to EIA standard RS-490.]● Continuous Average Output Power (both channels driven, 20-20,000 Hz)
140 watts per channel into 4 ohms
120 watts per channel into 6 ohms
100 watts per channel into 8 ohms
● Total Harmonic Distortion (both channels driven, 20-20,000 Hz)
0.05% with 4 to 16-ohm load
● Intermodulation Distortion 0.01%tyuio!0

HIGH LEVEL INPUT/POWER INPUT
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)● Damping Factor

200 (with 8-ohm load, 50 Hz)● Input Sensitivity,Input ImpedancePressing this button
opens the sub panel.

■ Rear panel
Option board
installation slots!1 !2● Frequency Response!3!4!5 !6!7Input sensitivity
Input
For rated output For 1W output (EIA) impedance
HIGH LEVEL INPUT 142 mV 14.2 mV 20 kilohms
BALANCED INPUT 142 mV 14.2 mV 40 kilohms
1.13 V 113 mV 20 kilohms
POWER INPUT
Input● Output Voltage, Output Impedance PRE OUTPUT: 1.13 V, 50 ohms (at rated continuous average output)● GainHIGH LEVEL INPUT → PRE OUTPUT: 18 dB
POWER INPUT→ 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● Signal-to-Noise Ratio!8!9★

!1 Attenuator button
q Input selector
w Function indicator LEDs
!2 Headphone jack
● Power Level Meters
e Volume level indication!3 Line inputs● Load Impedancer Volume control
TUNER CD LINE 1, 2, 3
● Stereo Headphonest Power switch!4 Recorder inputs and outputs
y Function buttons!5 Preamplifier outputs● Power Requirements
Speaker selectors (A: ON/OFF, B: ON/OFF)!6 Power amplifier inputs● Power Consumption
Recording selector (ON/PLAY)!7 Left/right speaker output terminals (2 sets, A/B)
Preamplifier/power amplifier separator (EXT PRE)Phase selector !8 CD/LINE inputs (balanced)● Maximum Dimensions
Pin w : -, Pin e : +u Bass control(Can be switched with phase selector
i Treble controlbutton y)o Balance control● Mass!9 AC power connector★
!0 Function buttons
Tone control (ON/OFF), MONO/STEREO selector,
Meter operation (ON/OFF), Volume level display (ON/OFF),■ Supplied accessories:
Loudness compensator, MC/MM selector●−20 dB

Input shorted (A weighting)
EIA S/NS/N ratio at rated output
95 dB
HIGH LEVEL INPUT
105 dB
95 dB
BALANCED INPUT
97 dB
101 dB
POWER INPUT
122 dB
Input

Logarithmic compression, peak reading meters, output dB/% scale
4 - 16 ohms
Suitable impedance: 8 - 100 ohms
AC 120 V/220 V/230 V 50/60 Hz (Voltage as indicated on rear panel)
49 watts idle
280 watts in accordance with IEC 60065
Width 465 mm (18-5/16") Height 171 mm (6-3/4")
Depth 422 mm (16-5/8")
21.7 kg (47.8 lbs) net
28.0 kg (61.7 lbs) in shipping carton

AC power cord

● Remote commander RC-200

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

●Specifications and design subject to change without notice for improvements.

http://www.accuphase.com

K1105Y PRINTED IN JAPAN

851-0209-00（B1）