integrated stereo amplifier e-270 - planet audio€¦ · · 2016-12-10rated output power...
TRANSCRIPT
![Page 1: Integrated Stereo Amplifier E-270 - Planet Audio€¦ · · 2016-12-10Rated output power •Class-AB 120W / channel into 4Ω 8Ω E-260 90W Accuphase Laboratory, Inc. 4Ω E-270 90W](https://reader034.vdocuments.site/reader034/viewer/2022050902/5ae316ad7f8b9a495c8ccd7a/html5/thumbnails/1.jpg)
Integrated Stereo AmplifierE-270
Accuphase Laboratory, Inc.
![Page 2: Integrated Stereo Amplifier E-270 - Planet Audio€¦ · · 2016-12-10Rated output power •Class-AB 120W / channel into 4Ω 8Ω E-260 90W Accuphase Laboratory, Inc. 4Ω E-270 90W](https://reader034.vdocuments.site/reader034/viewer/2022050902/5ae316ad7f8b9a495c8ccd7a/html5/thumbnails/2.jpg)
Improvement of power supply• Increased custom made capacitors
– 22,000μF x 2 pieces → 30,000μF x 2 pieces
Accuphase Laboratory, Inc.E-260 E-270
![Page 3: Integrated Stereo Amplifier E-270 - Planet Audio€¦ · · 2016-12-10Rated output power •Class-AB 120W / channel into 4Ω 8Ω E-260 90W Accuphase Laboratory, Inc. 4Ω E-270 90W](https://reader034.vdocuments.site/reader034/viewer/2022050902/5ae316ad7f8b9a495c8ccd7a/html5/thumbnails/3.jpg)
Rated output power• Class-AB 120W / channel into 4Ω
8ΩE-260 90W
Accuphase Laboratory, Inc.
8Ω
4Ω
E-270 90W
E-270 120W
E-260 115W
4% up
![Page 4: Integrated Stereo Amplifier E-270 - Planet Audio€¦ · · 2016-12-10Rated output power •Class-AB 120W / channel into 4Ω 8Ω E-260 90W Accuphase Laboratory, Inc. 4Ω E-270 90W](https://reader034.vdocuments.site/reader034/viewer/2022050902/5ae316ad7f8b9a495c8ccd7a/html5/thumbnails/4.jpg)
Ultra Low Noise• Lower noise than the former model E-260
– Actual noise voltage of speaker output: 35μV@Volume position: -30dB
Accuphase Laboratory, Inc.
35μV
EEEE----260260260260
EEEE----270270270270
45μV
23% downActual output noise voltage
![Page 5: Integrated Stereo Amplifier E-270 - Planet Audio€¦ · · 2016-12-10Rated output power •Class-AB 120W / channel into 4Ω 8Ω E-260 90W Accuphase Laboratory, Inc. 4Ω E-270 90W](https://reader034.vdocuments.site/reader034/viewer/2022050902/5ae316ad7f8b9a495c8ccd7a/html5/thumbnails/5.jpg)
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
ParalleledParalleledParalleledParalleled
Accuphase Laboratory, Inc.
AAVA: Accuphase Analog Vari-gain Amplifier
I-V converter
Low impedanceLow impedanceLow impedanceLow impedance
![Page 6: Integrated Stereo Amplifier E-270 - Planet Audio€¦ · · 2016-12-10Rated output power •Class-AB 120W / channel into 4Ω 8Ω E-260 90W Accuphase Laboratory, Inc. 4Ω E-270 90W](https://reader034.vdocuments.site/reader034/viewer/2022050902/5ae316ad7f8b9a495c8ccd7a/html5/thumbnails/6.jpg)
Technology for ultra low noise• Re-designed power amplifier for low noise
– Low-impedance feedback network
Low impedanceLow impedanceLow impedanceLow impedance
Accuphase Laboratory, Inc.
Power amplifier block with instrumentation amplifier configuration
![Page 7: Integrated Stereo Amplifier E-270 - Planet Audio€¦ · · 2016-12-10Rated output power •Class-AB 120W / channel into 4Ω 8Ω E-260 90W Accuphase Laboratory, Inc. 4Ω E-270 90W](https://reader034.vdocuments.site/reader034/viewer/2022050902/5ae316ad7f8b9a495c8ccd7a/html5/thumbnails/7.jpg)
Super high Damping-Factor• Two times higher than E-260
– Damping Factor: 400 guaranteed
100% up
Accuphase Laboratory, Inc.
400
800
200
Guaranteed Damping-Factor
EEEE----260260260260
EEEE----270270270270
![Page 8: Integrated Stereo Amplifier E-270 - Planet Audio€¦ · · 2016-12-10Rated output power •Class-AB 120W / channel into 4Ω 8Ω E-260 90W Accuphase Laboratory, Inc. 4Ω E-270 90W](https://reader034.vdocuments.site/reader034/viewer/2022050902/5ae316ad7f8b9a495c8ccd7a/html5/thumbnails/8.jpg)
• 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 E-270 - Planet Audio€¦ · · 2016-12-10Rated output power •Class-AB 120W / channel into 4Ω 8Ω E-260 90W Accuphase Laboratory, Inc. 4Ω E-270 90W](https://reader034.vdocuments.site/reader034/viewer/2022050902/5ae316ad7f8b9a495c8ccd7a/html5/thumbnails/9.jpg)
• 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
![Page 10: Integrated Stereo Amplifier E-270 - Planet Audio€¦ · · 2016-12-10Rated output power •Class-AB 120W / channel into 4Ω 8Ω E-260 90W Accuphase Laboratory, Inc. 4Ω E-270 90W](https://reader034.vdocuments.site/reader034/viewer/2022050902/5ae316ad7f8b9a495c8ccd7a/html5/thumbnails/10.jpg)
• Ready for the option board DAC-40– Sampling frequency on the front display– Possible to choose input source manually
Further more …
Accuphase Laboratory, Inc.
• high-quality remote commander
Multi function display Input selector for DAC