Description
Accuphase E-280
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.
Accuphase E-280 specifications:
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- AAVA volume control
- Power amplification stage with bipolar transistors in double parallel push-pull configuration
- Rated for 120 watts into 4 ohms and 90 watts into 8 ohms
- High damping factor of 500
- Power amplification stage configured as instrumentation amplifier
- Current feedback amplification topology in power amplification stage
- Logic-control relays for shortest signal paths
- Strong power supply with massive high-efficiency transformer and large filtering capacitors
- Protection circuitry using MOS-FET switches
- Two rear panel expansion slots allow use of option boards
Reinforced power amplification stageA 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 factorBalanced 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 stabilityThe 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
- 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
