Accuphsase E-800 Precision integrated Stereo Amplifier

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Country of Origin: Japan
Color: Gold
Warranty: 1 Year

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May 28 - 04 Jun, 2024
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The Accuphase E-800 is positioned above the E-650 as the new flagship model in the integrated amplifier lineup of Accuphase. The preamplifier section features the impeccable Balanced AAVA type volume control, while the power amplifier section is configured as an instrumentation amplifier using a six-fold parallel push-pull configuration of power MOS-FETs driven in pure Class A. The resulting quality is on a par with high-class separate type amplifiers. Operating as a simple and smart system, the Accuphase E-800 realizes acoustic excellence that reaches to the very heart of the music.

Level Precision thanks to AAVA
The smoothly running volume control only serves as a pulse generator, while 16 differently weighted current signals adjust the desired level via a cross-circuit both finely and precisely – in the upper range with steps of 0.2 decibels – precisely documented by the red digital display. AAVA is thus an active part of the amplifier circuitry and, according to the Japanese manufacturer, is intended to avoid signal loss, impedance fluctuations and distortions of usual attenuators. In the E-800, the circuit even works as “Balanced AAVA”, i.e. in balanced mode with a phase-true as well as inverted signal routing, which is supposed to put an end to even the last remaining, tiniest deviations.

As always in Accuphase amps, the power electronics, which are fed from a powerful central power supply, sit on separate heat sinks on both sides, separated by channel. Among them, the dozen MOS-FETs per channel are located, which in the Accuphase-typical “push-pull” method with two “hot” outputs shift the speaker membranes between them. To ensure that this happens in the most controlled way possible and that the Accuphase E-800 has a firm grip on the woofer in particular, the developers claim to have increased its damping factor by 25 percent compared to the previous top model, the E-650.

Stronger than on Paper, but not “Overpowering”
Those who expect an overpowering wattage due to the sheer size of the Accuphase E-800 and its power blocks were indeed deceived by it. The curved “Class A” lettering underneath the input selector, which is designed for long-term stable relays, already hints at it: the highest quality takes precedence over pure mass here. In order to avoid the dreaded transfer distortions during the transition of the signal from its positive to its negative half-wave, the power transistors are kept open over a wide power band; which worsens the efficiency because a good part of the energy is constantly dissipated in heat, but avoids potentially harmful switching processes.

According to the E-800’s data sheet, this range extends up to 50 watts per channel at eight ohms and 100 watts at four ohms. In reality, however, the amp is significantly stronger – see our measurement values under technical details – but above these marks it changes to switching mode, where level peaks are certainly offered, but are rarely reached in reality. Ultimately, the Accuphase is an AB amplifier with a particularly high quiescent current. Nevertheless, the E-800 is not a cheat, because the promised performance is achieved in Class A mode, as can easily be seen from the appropriate power consumption at rest. This energy has to go somewhere then; it flows directly into the cooling bodies. Nevertheless, the amplifier does not heat up excessively, which speaks for its Class A concept and design.

Maximum Openness via XLR
You can indulge yourself in the list of equipment, which is as rich as we expect it to be. The Japanese amp allows the connection of a wide range of devices, offers a switchable tone control, a balance control and a powerful headphone jack, which drives even demanding models effortlessly to peak performance. Tape fans will also discover a setup that allows for monitoring. Phase reversal, mono switch, loudness “compensator” and a muting round out the array of convenient features. As usual, most of these functions sit behind a small panel that slides down silently at the touch of a button.

Outputs and inputs are also found among the jacks in case you want to run the preamp or power amp sectors of the E-800 separately. Bi-amping can also be accomplished via RCA or XLR outputs, with the Class-A A-48 power amp from the Accuphase lineup being the natural partner.

In our large STEREO listening room, the “über-amp” had to prove itself on its own, playing with B&W’s quite picky 800D3. And it passed this test with flying colors. One is almost inclined to recognize the E-800 as a benchmark for the lightness and natural matter-of-factness with which an integrated amplifier can perform. Ana Caram’s rhythmically intricate “Telephone Song” bubbled out of the speakers in a completely relaxed and at the same time exemplarily fanned out and homogeneous manner. The song came from the Accuphase SACD player DP-560, which we connected completely with HMS Suprema cables – RCA, XLR and digital coaxial.

Option Boards Instead of External Solutions
When switching between the inputs, it became apparent that the E-800 achieves its extremely open playing style especially via XLR. Good thing that it is equipped with three of these. Via RCA, the playback quality narrowed a bit and appeared minimally rounded tonally. The high standards offered by the optional DAC-50 digital board (see side) were proven by the fact that the performance was very close to the XLR result. Thus, an external DAC is not needed in most cases.

The same applies to its phono counterpart AD-50. Even high-quality pickups are able to display all their qualities here, playing freely and uninhibitedly, spacious and powerful. The AD-50 can easily compete with separate phono preamps of the same price range. On top, you won’t need an additional device as well as a set of high-quality NF cables. The board module also relies on the electric potential of the E-800, which avoids disturbing equalizing currents – not an insignificant argument.

What had been foreshadowed during our first listening sessions with the Accuphase E-800 soon turned out to be a sound image filled with superlatives: the orchestra of Chadwick’s “Jubilee”, starting vehemently, stood in the room both high and deep as well as expansive, as if reproduced by a pre/power amplifier combination of the highest league. The sound was filled with grandeur and glory, even when the musicians dropped back to a quieter pace immediately after the start. The E-800 never lost its sense of the tension, keeping attention close to the melodic curves, but at the same time took a step back and observed the acoustic scenery from a superior perspective.

Mastering the Whole Spectrum Of course, the Accuphase arranges and structures decisively and with a precision worthy of a drawing board. At the same time, however, it brings all those lines together into a harmonious whole and thus manages the balancing act between analytics that reveal every detail and an emotional coherence that is astonishing. Even when one considers the price range. The impression of pronounced naturalness and floating grace is supported by the truly exorbitant colorfulness of the mids, which are as dazzling as they are sonorous and reproduced without any artificiality. This turns the E-800 into a master of voices, atmosphere and nuances, which seems immensely alive and “real” all in all. Of course, this “über-amp” can also be loud, but it was not created to beat up speakers. It rather produces enchanting music!

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