Accuphase E-270: Integrated amplifier that exceeds its class

Accuphase Laboratories, Inc. (originally known as Kensonic Laboratories, Inc.) – Japanese manufacturer of high-end electronics. Accuphase Laboratories was founded in 1972 by disgraced Kenwood Corporation engineer Jiro Kasuga. Kasuga did not agree with Kenwood’s position in the approach to the development of equipment; many of its developments never reached mass production due to commercial unprofitability for the corporation. After a series of negotiations with Kenwood management, Kasuga creates the Kensonic brand, where it lures several leading engineers from Marantz and Luxman companies.

The name Accuphase was made up of the prefix “ACCU” – from the word accurate, “accurate”, and the word PHASE, “phase”, which is the most important characteristic in sound reproduction technology. This trademark is very suitable for the company's products, since it reflects this and other important characteristics and penetrates the very depths of sound reproduction technology.

In the endless struggle for better quality, which requires a very high level of production organization, it was decided to abandon assembly line methods. In this regard, production volume is limited, and Accuphase brand products can only be purchased in some specialized stores. Accuphase equipment is not subject to the whims of fashion, since it is created, first of all, for the sake of truly high fidelity sound reproduction. This is the main reason why these products have not become the subject of mass production.

The sound quality produced by the Accuphase E-270 amplifier significantly exceeds its class and is close to the level of monoblock amplifiers. The power amplifier section features high-power transistors in a parallel push-pull configuration, complemented by a reliable power supply and a low-impedance output stage. 120 W of quality power into a 4 ohm load with a damping factor of 400. The current feedback topology provides excellent phase characteristics over a wide range, and the balanced amplifier circuit allows you to fully reveal the finest nuances of the musical signal. Power MOS-FET switches in the audio speaker protection circuit eliminate the need for mechanical relay contacts.

Revolutionary AAVA volume control with reduced noise level. The volume control in the preamp section is a component that has a critical impact on performance and sound quality. AAVA is a revolutionary type of analog volume control that completely eliminates any variable resistors in the signal path. This ensures that the signal remains completely unchanged, without the side effects of impedance changes. As a result, the signal-to-noise ratio and sound quality are excellent at all volume levels.

Features of the Accuphase E-270

Power transistor output stage, parallel balanced: 90 W x 2 at 8 ohms
Logic control relays for the shortest signal paths
Powerful power supply with massive high-efficiency transformer and high-capacity capacitors
MAIN IN button allows for separate use of preamp sections and power amplifier
Beautiful analogue dial indicators
High-quality gold-plated speaker terminals

Accuphase E-270 Specifications

Circuit design Semiconductor
Load impedance 4 – 16 Ohms
Output power (at 8 Ohms) in W 90
Output power (at 4 Ohms) in W 120
Signal-to-noise ratio 122 dB
Harmonic distortion 0.05% (4 – 16 Ohm, 20 Hz – 20 kHz) Total
harmonic distortion 0.02%
Input impedance 20 kOhm
Inputs linear x6 balanced x1 PreAmp
Headphone outputs x1 linear x1 PreAmp
Tone control Yes
Remote control Yes
Power consumption 245 W, 46 W (in standby mode)
Dimensions (W x H x D) mm 465x151x420
Weight 20 kg

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