Yokohama, Japan | 2020 – Integrated Amplifier With More Output Power and Further Evolved Performance. The E-380 realizes a 20% increase in rated output power thanks to a reinforced power amplification stage and power supply. The further evolved AAVA volume control system allows music enjoyment at any level without even the slightest degradation of signal quality. The power amplifier section utilizes the instrumentation amplifier principle to achieve outstanding S/N ratio. Low impedance design of the output circuitry results in a damping factor of 500, ensuring that the potential of every speaker can be brought out to the fullest. Enjoy a musical performance of amazing transparency and dynamism.
Innovation ‒ At the leading edge of technology
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AAVA volume control
AAVA is a revolutionary type of volume control that completely does away with any variable resistors in the signal path, using instead a combination of 16 V-I converter amplifiers with different gain. Unlike in conventional volume controls, the music signal is not being attenuated by a rotary resistor, so that optimum S/N ratio and low distortion can be maintained over the entire volume range. The signal degradation and impedance changes of older designs are now a thing of the past. The E-380 uses four maximum-gain V-I converter amplifiers, followed by two amplifier circuits in parallel configuration, 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 differences between left and right channel
● High channel separation
● Left/right balance adjustment and attenuation also realized with AAVA
Sound quality ‒ Simply aiming for the best
■ Power amplification stage with bipolar transistors
The power amplification stage features bipolar transistors in a double parallel push-pull configuration.
■ 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.
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■ Power supply circuitry designed for optimum stability
The large transformer and massive 33,000 μF filtering capacitors
with 10% more capacitance provide rock-stable high-quality power.
■ 20% more rated output power
Two power amplifier units for left and right mounted directly to large heat sinks deliver ample power, rated for 120 watts into 8 ohms or 180 watts into 4 ohms.
Advanced features
- Logic-control signal switching relays for shortest signal paths
- Five line level and two balanced inputs
- 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
- Convenient attenuator is useful for example when operating an analog record player
- Loudness compensator enhances low end presence
- Tone controls using summing active filters
- Power amplification stage employs instrumentation amplifier principle
- 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-40 or DAC-50) is installed
- Numeric indication of digital signal sampling frequency (when DAC-40 or DAC-50 is installed)
- High-sensitivity analog peak power meters
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