Integrated Stereo AmplifierE-270
Accuphase Laboratory, Inc.
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
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
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
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
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
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
• 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
• 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
• 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
