Accuphase E-280 Integrated Amplifier

Accuphase E-280 Integrated Amplifier

Yokohama, Japan | 2020 – Integrated Amplifier with Scalability that Exceeds the Imagination! The AAVA volume control builds upon the knowledge of high-end equipment to control volume without loss of information. The power amplification section utilizes the instrumentation amplifier principle to create an ideal speaker driver. The low impedance design of the output circuitry brings out the full potential of every speaker. Two option boards can be added for improved expandability. The E-280 sound performance will defy the imagination.

AAVA volume control


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Accuphase E-280 Integrated Amplifier

AAVA is a revolutionary type of volume control that completely does away with any variable resistors in the signal path, instead using a combination of 16 V-I converter circuits with different gain. Unlike conventional volume controls, the music signal is not attenuated by a rotary resistor, so that low distortion and an optimum S/N ratio can be maintained over the entire volume range. The E-280 utilizes maximum gain in 4 parallel rows and secondary V-I converter circuits arranged in 2 parallel rows, which doubles the total output current capability and halves the circuit impedance to further reduce noise.

Accuphase E-280 Integrated Amplifier

AAVA features
● Purely analog principle avoids the inherent noise of digital circuitry ● Excellent S/N ratio at any volume level position
● No change in sound quality over the entire range
● Finely graded volume adjustment steps
● No volume difference between left and right channels
● High channel separation
● Left/right balance adjustment and attenuation also realized with AAVA

Sound quality – Simply aiming for the best

Accuphase E-280 Integrated Amplifier

Reinforced power amplification stage
A power amplification stage with two bipolar transistors in a double parallel pull-push configuration for the left and right channels mounted directly to large heat sinks. Rated output of 90 W into 8 ohms or 120 W into 4 ohms of high power.

25% improved damping factor
Balanced Remote Sensing and MOS-FET switches result in a damping factor of 500, representing a 25% improvement over the predecessor model.

Power supply circuitry designed for optimum stability
The large transformer and massive 30,000 μF filtering capacitors provide rock-stable high-quality power.

Accuphase E-280 Integrated Amplifier

Advanced features

Logic-control signal switching relays for shortest signal paths

Five line level inputs and one balanced input

Line input and output connectors for a recorder

Individual phase setting for each input

Stereo signal can be switched to monophonic operation

Left/right balance control also realized with AAVA

–20 dB attenuator

Loudness compensator enhances low end presence

Tone controls using summing active filters

Power amplification stage configured as

an instrumentation amplifier

Current feedback amplification circuit topology assures

excellent phase characteristics in high range

Speaker output protection circuit guards against


Protection circuitry using MOS-FET switches

Two sets of large speaker terminals

Preamplifier and power amplifier sections can be

used separately

Preamplifier outputs also support bi-amping connection

Power amplifier inputs allow use of that section only

Dedicated headphone amplifier designed for optimum

sound quality

Two rear panel expansion slots allow use of option boards

DAC input selector button for use when digital input board

(DAC-50 or DAC-40) is installed

Numeric indication of digital signal sampling frequency

(when DAC-50 or DAC-40 is installed)

High-sensitivity analog peak power meters

Accuphase E-280 Integrated Amplifier
Accuphase E-280 Integrated Amplifier
Accuphase E-280 Integrated Amplifier



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