Description
Accuphase E-4000 Class AB Integrated Amplifier
Refined Power, Inspired by Separation
The Accuphase E-4000 integrated amplifier brings together the refined control of separate pre and power amplifiers in a single, elegant chassis. Its design is informed by the philosophy and circuit architecture of Accuphase’s higher-end separates, delivering premium audio performance without the complexity of a multi-unit system. With a focus on transparency, detail, and dynamic depth, the E-4000 redefines what an integrated amplifier can achieve in high-end home audio.
AAVA Volume Control with Advanced ANCC
At the core of the E-4000’s preamplifier section lies the revolutionary AAVA volume control system, enhanced with Accuphase Noise and Distortion Cancelling Circuit (ANCC) technology. This ensures accurate, noise-free adjustment at any listening level without sacrificing musical vibrancy or resolution. The result is a listening experience that retains the full emotional intensity of a live performance, even at lower volumes.
Balanced Class AB Power with Exceptional Control
The power amplification stage features a four-fold parallel push-pull configuration of power transistors operating in Class AB. Designed using the instrumentation amplifier principle and balanced transmission, this layout minimises noise while maximising dynamic power and sonic control. A high damping factor of 800 ensures tight, authoritative control over loudspeakers, while a robust toroidal transformer and large high-voltage capacitors deliver unwavering current stability. The E-4000 is engineered to bring out the finest textures in your music while delivering effortless scale and power.
Key Features
- Revolutionary AAVA volume control with ANCC for low-noise, high-precision adjustment
- Fully balanced architecture from input to output
- Power amplification stage designed as an instrumentation amplifier
- Four-fold parallel push-pull power transistor configuration in Class AB
- High power output: 180 watts into 8 ohms / 260 watts into 4 ohms
- High damping factor of 800 for precise speaker control
- Massive high-efficiency toroidal transformer for stable current supply
- Large high-voltage filtering capacitors for dynamic headroom
- Protection circuitry using low-impedance, highly reliable MOS-FET switches
