The AAVA volume control system represents a significant advancement in volume regulation, drawing upon the expertise of high-end equipment to ensure precise volume adjustments without compromising audio fidelity. In the Accuphase E-280, this technology eliminates variable resistors from the signal path, employing 16 V-I converter circuits with varying gain to maintain an optimal signal-to-noise ratio and minimal distortion across the entire volume range. By eschewing traditional rotary resistors, the music signal remains unaltered, allowing for exceptional clarity and fidelity. The E-280 integrates maximum gain in four parallel rows and secondary V-I converter circuits in two parallel rows, effectively doubling the output current capability and halving circuit impedance to further mitigate noise.

KEY HIGHLIGHTS

• AAVA volume control system, revolutionizing volume adjustment by eliminating variable resistors and ensuring consistent audio quality.


• Enhanced power amplification stage featuring two bipolar transistors in a double parallel push-pull configuration for both left and right channels, delivering a rated output of 90 watts into 8 ohms or 120 watts into 4 ohms.


• A 25% improvement in damping factor achieved through Balanced Remote Sensing and MOS-FET switches, resulting in a damping factor of 500 compared to the predecessor model.


• Optimum stability in power supply circuitry, facilitated by a large transformer and substantial 30,000 μF filtering capacitors, ensuring a steady supply of high-quality power for superior audio performance.

FEATURES

• 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