● Revolutionary AAVA volume control ● Output stage with high-power transistors in parallelpush-pull arrangement delivers high quality power: 90 watts x 2 into 8 ohms ● Power amplifier
stage features instrumentation amplifier configuration for balanced signal transmission.
● Logic-control relays for shortest signal paths ● Strong power supply with massivehigh-efficiency transformer and large filtering capacitors ● MAIN IN button allows separate
use of preamplifier and power amplifier sections ● Numeric indication of volume level

Taking the integrated amplifier to further heights
Pursuit ofperformance and sound quality results in capability well beyond its class,approaching the level of separate type amplifiers.
Revolutionary AAVA volume control. A power amplifier section featuring high powertransistors in parallel push-pull configuration, complemented by a robust power supply and low
impedance output stage. 120 watts of quality power into 4 ohms, with a damping factor of 400.
Current feedback amplifier topology assures excellent phase characteristics in the high range,and instrumentation amplifier principle enables fully balanced signal paths. Power MOS-FETswitches in the protection circuitry eliminate the need for mechanical contacts.

Innovative Technology

AAVA volume control with further lowered noise floor
The volume control in the preamplifier section is a crucial component with a decisive
influence on performance and sound quality. AAVA is a revolutionary type ofcompletely analog volume control that completely does away with any variable
resistors in the signal path. This ensures that the signal remains perfectly unaltered,
free from the adverse effects of impedance changes. As a result, both S/N ratio andsound quality are excellent at any volume setting.

How AAVA works

OutputOutput of 16 V-I converters
is combined for volumecontrol action

0.5

0.4

0.3

Current ratio
0.2■ AAVA volume control assembly with higher integration density of components and circuitry

0.1■ Configuration with a total of 18 V-I converter amplifiers, paralleled for upper
two units, reduces overall AAVA impedance to one half and results in lower
noise. Input stage with five buffer amplifiers ensures powerful drive capability.
■ No more left/right tracking differences or crosstalk.
■ Attenuator and balance control also implemented by AAVA, eliminating
additional circuitry.
■ Operation feel is exactly the same as a conventional volume control, andremote control is also possible.
■ Combination of 16 types of weighted V-I converter amplifiers gives 65,536
possible volume steps.
■ Volume level can be displayed accurately as a numeric indication.

0V-I converters enablefinely graded control
1－
1－
1－
1－
1－
1－
1－
1－
1－
1－
1－
1－
1－
1－
1－
1－

16 types ofV-I converters

2122

223

324

425

26

52 8Music signal is62 972 10
converted into 16 types
82 119of weighted currents
2 1210711Input

212213

13214

14215

15

Minimum value forcontrol current: 1/65,536

216
16

Advanced Features

Speaker selector
Semiconductor MOS-FET switches

Assembly with protection circuitry
directly linked to speaker terminals

Preamplifier/power amplifier
separation button++ INPUT

Signal Sensing–NFB
NETWORK+NFB
NETWORK＋ Signal

POWER
AMP–NFBNETWORK

Speaker Terminals–– INPUT－ GND+Ground Sensing

Balanced Remote Sensing

Peak power meters

Sampling frequency display exampleLeft: MC/MM selector button
Right: Phase selector button
DAC input selector

Line and balanced input connectors
16Low frequency
range

1812Boost

161412

Response in dB

864High frequency
range

8LOUDNESS COMPENSATOR: ON

1040
─42CutResponse in dB■ Protection circuitry employs semiconductor(MOS-FET) switches for low impedance and excellent long-term reliability.
■ Two sets of large speaker terminals.
Y lugs and banana plugs are also supported.
■ Balanced remote sensing technology provides
balanced feedback for both the signal and GND
lines from near the speaker terminals to ensure
low impedance and high damping factor. Minimizing the amplifier's output impedance results in adamping factor of 400.
■ Bi-wiring connection using the two sets of speaker terminals is supported.
■ Analog peak power meters with new LED lighting
for improved legibility.
■ Versatile array of input options including balanced inputs to shut out external noise interference.
■ MAIN IN button and preamplifier output andpower amplifier input connectors allow independent use of both sections.
■ Individual phase setting is possible for each input
position (with memory).
The balanced connectors support both pin 2 ⊕and pin 3 ⊕ configurations.
■ Rear panel expansion slot allows the use ofoption boards.
■ Option boards provide additional versatility for
digital input (USB, coaxial, optical) handling or
analog record playback.
■ DAC input selector allows displaying the sampling frequency of the digital signal onto which
the amplifier has locked.
■ With the AD-30 board, MC/MM switching on thefront panel is possible.
■ Logic-controlled relays for signal switching assurehigh sound quality and long-term reliability.
■ Dedicated headphone amplifier optimized forsound quality.
■ "High Carbon" cast iron insulator feet with superior damping characteristics further enhancesound quality.

0−2−6─8─12−410100

1kFrequency in Hz

10k100k

Loudness Compensator Characteristics

─1610BASS
Adjustment range

TREBLE
Adjustment range

10010k1kFrequency in Hz

100k

Tone Control Characteristics
PRE OUT/MAIN IN connectors

■ Supplied Remote Commander
RC-230Allows volume adjustment andinput source switching.

Designed for Maximum Sound Quality■ Parallel push-pull output stage and power amplifier stage
mounted on large heat sink. Two identical units arearranged on the left and right sides of the chassis.
■ Power amp units use high-power transistors in a robust
parallel push-pull configuration, producing ample output
of 120 watts into 4 ohms or 90 watts into 8 ohms perchannel.

+ B3+ B2
Biasstabilizer

Q5Q9＋

Q1+ B1Q3OUTPUTNFBNETWORK

Q2－105W
120W
90W50Q4Q6＋Bias
stabilizer

Q825Q 12Q 10– B3Outputpower 100(W)75Biasstabilizer

NFB
NETWORK150W

125

NFB
NETWORK

INPUT

175
150

Q 11

Q7－Q 15

Q 13

Q 14

Q 16– B1– B2Circuit diagram of E-270 power amplifier (one channel)

Max. output power
Rated output power

8 ohms4 ohms
Impedance (Ohms)

Output power characteristics■ Strong power supply with massive high-efficiency
transformer and large filtering capacitors.
The E-270 uses a massive power transformer with highoutput capability. Highly effective filtering is realized withtwo custom-made aluminum electrolytic capacitors,
each with a vastly increased 30,000 µF rating.

Dedicated Option Boards

Bi-amping for further enhanced soundIn a bi-amped setup, the speaker units for the LOW frequency
range and the HIGH frequency range are driven by separate amplifiers, which enables playback with even higher sound quality.

＊ The speakers musthave a built-in
crossover network andseparate inputs for
LOW and HIGH range.
＊ The example shows asetup with anadditional power
amplifier for the low
frequency range.

Left speaker⊖ ⊕⊖ ⊕⊖ ⊕⊖ ⊕HIGH

HIGHRIGHT

E-270

Right speakerLOWLOWLEFT－ ＋ － ＋● The E-270 provides one slot foran option board
on the rear panel.
● Option boards canbe used to realize
direct connectionof digital signals
for high-quality
music playback, or
to enjoy high-quality playback ofanalog records.
● The Analog Disc
Input Boards AD-9/
DAC-40AD-30
AD-10/AD-20 can
also be used. In The photos show examples for option board installation.
this case, the MC/MM button on the front panel of the E-270 has no effect.
MC/MM switching must be performed on the board.

Digital Input Board

From PRE OUTLEFTRIGHT－ ＋ － ＋Analog
outputTo INPUT
CD player

Power amplifier (P-4200, A-36 or similar)

DAC-40connection example

Coaxial digital cable(up to 192 kHz/24 bit)

Optical fiber cable(up to 96 kHz/24 bit)

USB cable(up to 192 kHz/24 bit)

DAC-40

Analog Disc Input Board

DAC-40● Switching between the COAXIAL, OPTICAL, or USB input can be● MM/MC switching can be performed on the front panel of the E-270.

performed on the front panel of the E-270, and the sampling
frequency can be shown on the display.
● COAXIAL: For 75-ohm coaxial cable, IEC 60958/AES-3 compliant
Supported sampling frequency range: 32 kHz to 192 kHz, 24 bit● OPTICAL: For optical fiber cable, IEC 60958/AES-3 compliant
Supported sampling frequency range: 32 kHz to 96 kHz, 24 bit● USB:For USB cable with Type B connector
USB 2.0 High Speed (480 Mbps) compliant
Supported sampling frequency range: 32 kHz to 192 kHz, 24 bit● On-board switches for input impedance switching and subsonic filter

MC: Gain 66 dB, Impedance 30/100/300 ohms
MM: Gain 40 dB, Impedance 47 kilohms

Line Input Board

Rear panel

Level/frequency display

Recorder inputs
and outputs

Volume control

Option board
installation slot

Headphone jackLoudness compensator ON/OFF button
Balance control
Tone controls
TONE ON/OFF button, BASS/TREBLE

Guaranteed Specifications● Tone Controls● Rated Continuous Average Output Power(both channels operating simultaneously, 20 - 20,000 Hz)
120 W/ch 4-ohm load
90 W/ch 8-ohm load
● Total Harmonic Distortion (both channels operating simultaneously, 20 - 20,000 Hz)
0.05%
4 to 16 ohm load
● Intermodulation Distortion 0.01%● Frequency Characteristics HIGH LEVEL INPUTAt rated continuous average output: 20 - 20,000 Hz +0, –0.5 dB
MAIN INAt rated continuous average output: 20 - 20,000 Hz +0, –0.2 dB
At 1 watt output:
3 - 150,000 Hz +0, –3.0 dB

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● S/N Ratio,Input-converted Noise–20 dB

Input shorted (A weighting)
S/N ratio at rated output
HIGH LEVEL INPUT
106 dBBALANCED INPUT
91 dB
MAIN IN
122 dBInput

EIA S/N
97 dB
96 dB
102 dB● Power Level Meters

Logarithmic peak level indication, shown in dB and %● Load Impedance

4 - 16 ohms (Terminals A and B)

Input
For rated output For 1 W output (EIA) impedance● Stereo Headphones

Suitable impedance: 8 ohms or higher

20 kilohms
40 kilohms
20 kilohms● Power Requirements

120 V/220 V/230 V AC, 50/60 Hz (Voltage as indicated on rear panel)● Power Consumption

46 watts idle
245 watts in accordance with IEC 60065

400 (with 8-ohm load, 50 Hz)

HIGH LEVEL INPUTBALANCED INPUT
MAIN IN

CD input connectors (balanced)
Pin ② (−), Pin ③ (+)(Can be changed with phase selector button on front panel)

Mono/stereo selector button＊ Guaranteed specifications are measured according to EIA standard RS-490.

Input

Preamplifier output connectors (Line)Power amplifier input connectors(Line)
Left/right speaker output terminals(2 sets, A/B)

AC power supply connector★

Attenuator ON/OFF button● Input Sensitivity,Input ImpedanceLINE-10

Provides an additional set of unbalanced line level inputs.

Line input connectors
TUNER, CD, LINE 1,2,3

Power switch
MAIN IN (preamplifier/poweramplifier separation) button● Damping Factor

AD-30

Features a high-performance, high-gain phono equalizer for
playback of analog records with outstanding sound quality.

Peak power meters

Speaker output selector
Recorder selector
DAC input selector and display switch
MC/MM selector button
Phase selector button

Computer＊ For playback of material on a computer via the USB port, it isnecessary to install software from the supplied USB Utility
CD-ROM. (Not required with an Apple Macintosh computer.)

Provides inputs for reproducing digital music signals from digitalcomponents.

Front panel

Input selector

Digitalcomponent

Digital (S/PDIF) output

Input sensitivity

134 mV
134 mV
1.07 V14.2 mV
14.2 mV
113 mV● Output Voltage,
Output Impedance

PRE OUTPUT 1.07 V 50 ohms
(at rated continuous average output)● GainHIGH LEVEL INPUT → PRE OUTPUT : 18 dB
MAIN IN→ OUTPUT:28 dB● Maximum Dimensions Width 465 mm (18.3")
Height 151 mm (5.9")
Depth 420 mm (16.5")● Mass20.0 kg (44. lbs) net
26.0 kg (57.3 lbs) in shipping carton

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

Supplied accessories● AC power cord
● Remote commander RC-230●The specifications and appearance of this product are subject to change without notice.

5年間保証

K1605Y PRINTED IN JAPAN 850-2200-00（B1）