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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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.
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
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.
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
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Current feedback amplification circuit topology assures
excellent phase characteristics in high range
Speaker output protection circuit guards against
short-circuiting
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
