Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB...

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Integrated Stereo Amplifier E E E- - -370 370 370 370 Accuphase Laboratory, Inc.

Transcript of Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB...

Page 1: Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB 150W / channel into 4 ohm 8ohm E-360 100W Accuphase Laboratory, Inc. 4ohm E-370 100W

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Accuphase Laboratory, Inc.

Page 2: Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB 150W / channel into 4 ohm 8ohm E-360 100W Accuphase Laboratory, Inc. 4ohm E-370 100W

Improvement of power supply• Reinforced power transformer• Increased capacitors

– 22,000μF x 2 pieces → 30,000μF x 2 pieces

Accuphase Laboratory, Inc.

E-360 E-370

Page 3: Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB 150W / channel into 4 ohm 8ohm E-360 100W Accuphase Laboratory, Inc. 4ohm E-370 100W

Rated output power• Class-AB 150W / channel into 4 ohm

8 ohm

E-360 100W

Accuphase Laboratory, Inc.

8 ohm

4 ohm

E-370 100W

E-370 150W

E-360 140W

7% up

Page 4: Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB 150W / channel into 4 ohm 8ohm E-360 100W Accuphase Laboratory, Inc. 4ohm E-370 100W

Ultra Low Noise• Lower noise than the former model E-360

– Actual noise voltage of speaker output: 34μV@Volume position: -30dB

Accuphase Laboratory, Inc.

34μV

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48μV

30% down

Actual output noise voltage

Page 5: Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB 150W / channel into 4 ohm 8ohm E-360 100W Accuphase Laboratory, Inc. 4ohm E-370 100W

Technology for ultra low noise• AAVA re-designed for low noise

– Paralleled V-I converter in larger two units– Low-impedance feedback network I-V converter

Paralleled

Accuphase Laboratory, Inc.

AAVA: Accuphase Analog Vari-gain Amplifier

I-V converter

Low impedance

Page 6: Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB 150W / channel into 4 ohm 8ohm E-360 100W Accuphase Laboratory, Inc. 4ohm E-370 100W

Technology for ultra low noise• Power amplifier re-designed for low noise

– Low-impedance feedback network

Low impedance

Accuphase Laboratory, Inc.

Power amplifier block with instrumentation amplifier configuration

Page 7: Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB 150W / channel into 4 ohm 8ohm E-360 100W Accuphase Laboratory, Inc. 4ohm E-370 100W

Super high Damping-Factor• Two times higher than E-360

– Damping Factor: 400 guaranteed

100% up

Accuphase Laboratory, Inc.

400

800

200

Guaranteed Damping-Factor

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Page 8: Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB 150W / channel into 4 ohm 8ohm E-360 100W Accuphase Laboratory, Inc. 4ohm E-370 100W

• Balanced Remote-sensing– Feedback from speaker terminal proximity– Signal-line and GND-line sensing

Signal sensing

Technology for high DF

Accuphase Laboratory, Inc.

Signal sensing

Speaker terminal

Power Amplifier

+

-

Signal

GND

GND sensing

Page 9: Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB 150W / channel into 4 ohm 8ohm E-360 100W Accuphase Laboratory, Inc. 4ohm E-370 100W

• Speaker protection equipped with MOSFET • Short signal path configuration

Technology for high DF

Accuphase Laboratory, Inc.Protection AssemblyOn-resistance: 2.6 mΩ

MOS-FET switch

Brass bar

Page 10: Integrated Stereo Amplifier EEEE----370370€¦ ·  · 2016-01-16Rated output power • Class-AB 150W / channel into 4 ohm 8ohm E-360 100W Accuphase Laboratory, Inc. 4ohm E-370 100W

• Ready for the option board DAC-40– Sampling frequency on the front display

Further more …

Accuphase Laboratory, Inc.

• high-quality remote commander