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E-800S

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Class-A PRECISION INTEGRATED STEREO AMPLIFIER

The E-800S is our flagship model that incorporates the full breadth of Accuphase's accumulated knowledge on integrated amplifiers. The preamplifier section incorporates a Balanced AAVA type volume control, while the power amp stage relies on an instrumentation amplifier principle and six-fold parallel push-pull configuration using power MOS-FETs driven in Class A, driving any loudspeakers to higher dimensions of sound. Enjoy the blissful acoustic space provided during playback with the E-800S.

Positioning and Preamplifier Excellence

Positioned as the new flagship model above the E-650, the Accuphase E-800S integrates cutting-edge technology with meticulous craftsmanship to redefine the standards of integrated amplification. The preamplifier section boasts the impeccable Balanced AAVA type volume control, ensuring precise volume adjustment without signal degradation or impedance fluctuations. Operating seamlessly as a simple and smart system, the E-800S delivers acoustic excellence that resonates with the very essence of the music.

Vintage Design and Unparalleled Power

Exuding an aura of solid luxury, the E-800S features a lavish champagne gold front panel that dynamically changes its appearance with the viewing angle. The power amplification stage harnesses a formidable six-fold parallel push-pull configuration of power MOS-FETs driven in pure Class A, delivering impeccable power with linear progression for both channels. With capabilities of 50 watts into 8 ohms, 100 watts into 4 ohms, and 200 watts into 2 ohms, the amplifier ensures an immersive listening experience, even supplying 300 watts into 1 ohm for music signals.

Optimized Stability and Enhanced Sensory Experience

Designed for optimum stability, the E-800S's power supply circuitry features a massive high-efficiency toroidal transformer and two large 60,000 μF filtering capacitors, ensuring a stable current supply at all times. The amplifier's high-accuracy, high-rigidity volume sensor construction guarantees silky smooth operation, while the Balanced AAVA type volume control maintains high signal-to-noise ratio and low total harmonic distortion throughout the volume range. Additionally, features such as Balanced Remote Sensing and MOS-FET switches contribute to a damping factor of 1000, allowing every loudspeaker to unleash its full musical potential with superb motion control.

The E-800S is our flagship model that incorporates the full breadth of Accuphase's accumulated knowledge on integrated amplifiers. The preamplifier section incorporates a Balanced AAVA type volume control, while the power amp stage relies on an instrumentation amplifier principle and six-fold parallel push-pull configuration using power MOS-FETs driven in Class A, driving any loudspeakers to higher dimensions of sound. Enjoy the blissful acoustic space provided during playback with the E-800S.

Innovation ‒ At the leading edge of technology

Balanced AAVA type volume control circuit

Conventional preamplifiers use variable resistors to adjust volume, which can cause contacts to deteriorate and create rasping as well as increase noise at normal volume levels. AAVA, however, produces multiple, widely varying signals from the input signal and controls volume by changing the combination of those signals. This achieves minimum noise at all volume levels without any rasping. The E-800S relies on Balanced AAVA comprised of balanced AAVA circuits, reducing the overall noise level by 10% compared to conventional models at typical volume positions.

ANCC significantly reduces distortion and noise

(Accuphase Noise and distortion Canceling Circuit)

The E-800S’s I-V conversion amplifier uses the ANCC principle. ANCC uses a secondary amplifier to cancel out noise and distortion from the main amplifier. The secondary amplifier utilizes a low-noise amplifier (noise density: 1.5 nV/√Hz) to increase the effect of the ANCC. Incorporating this ANCC in the AAVA I-V conversion amplifier drastically improves noise performance, particularly when transitioning from low volume settings to typical volume positions.

High-accuracy, high-rigidity volume sensor construction

The volume sensor mechanism carved from a single aluminum block ensures silky-smooth operation, a weighty operational feel, and accurate position detection. Operations with the remote commander are so quiet that mechanical noise is hardly noticeable.

Power amplification stage configured as an instrumentation amplifier

The instrumentation amplifier circuitry's equal impedance on the + and – sides and
exceptional external noise suppression provide optimal performance for an audio amplifier.

Sound quality ‒ Simply aiming for the best

Power amplification stage that achieves linear output 

The power amplification stage on both the left and right sides features a large heat sink and employs six-fold parallel push-pull MOS-FETs driven in Class A to provide linear power output of 50 watts into 8 ohms, 100 watts into 4 ohms, and 200 watts into 2 ohms.

Power supply circuitry delivers steady power

A strong power supply featuring a massive toroidal transformer and two high-voltage, large filtering capacitors (63,000 μF/63 V) offer a stable power supply at all times.

High damping factor brings out the full potential of speakers

The damping factor represents the amplifier's ability to drive the speakers. A damping factor of 1,000 (guaranteed) extracts the maximum potential from the loudspeakers.

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HIGHLIGHTS

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• Integrated amplifier with fully balanced configuration from input to output
  


• Balanced AAVA type volume control


• High-accuracy, high-rigidity volume sensor construction


• Power amplification stage configured as an instrumentation amplifier


• Six-fold parallel push-pull configuration using power MOS-FETs driven in Class A


• Linear power output of 50 watts into 8 ohms, 100 watts into 4 ohms, or 200 watts into 2 ohms


• High damping factor of 1,000


• Strong power supply with massive high-efficiency toroidal transformer and large filtering capacitors


• Protection circuitry using MOS-FET switches


• Three sets of balanced inputs


• Dedicated, high-quality headphone amplifier with discrete circuitry


• Speaker output protection circuit guards against short-circuiting


• High-carbon cast iron insulators for superior vibration damping


• Two expansion slots for option boards