Accuphase A-75: Massive stereo amplifier from the Japanese company

Accuphase A-75
Accuphase A-75

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.

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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.

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Accuphase has released the A75 stereo power amplifier. The massive device operates in pure Class A and is built using discrete semiconductors. The circuitry uses Balanced Remote Sensing technology, which optimizes the operation of the OOS. The amplifier section uses 10 MOSFET transistors in parallel in a push-pull configuration, and the device produces 60 W per channel into 8 ohms. Thanks to the MCS+ system, the developers managed to achieve a signal-to-noise ratio of 122 dB from the amplifier (and 128 dB at -12 dB). According to the developers, the A75 is able to cope with any acoustics. The amplifier supports bi-amping and bridge mode. On the rear panel of the device, in addition to four pairs of speaker terminals, there are RCA and XLR connectors.

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Accuphase A-75 has a control with which you can reduce the gain (0, -3, -6, -12 dB). This device is equipped with a “Normal” operating mode switch, that is, Stereo, “Dual Mono” and “Bridged”. You can connect two pairs of speakers to it and switch them from the front panel of the power amplifier. The front panel is made of anodized aluminum 8 mm thick.
Beautiful digital LCD displays mesmerizingly move to the beat of the music. The gold-plated, high-quality speaker connectors allow you to connect spade-type cables.

Characteristics of Accuphase A-75

Output power 2 x 60 watts at 8 ohms, 2 x 120 watts at 4 ohms, 2 x 240 watts at 2 ohms, 2 x 480 at 1 ohms.
Reproduction frequency from 20 to 20000 Hz
Total harmonic distortion < 0.01%
Signal-to-noise ratio > 121 dB
Damping coefficient 1000
Operating mode Pure class “A”
Circuitry Fully balanced
Transistors 10 pairs of MOSFETs connected in parallel
Protection Automatic, against direct current, overload , and short circuit.
Inputs 1 pair RCA, 1 pair XLR
Switching to bridge mode Yes, the switch is installed on the rear panel
Gain 28 dB
Acoustic outputs 2 pairs (A+B)
Operating voltage 230 volts / 50 Hz
Power consumption 520 watts
Dimensions (WxHxD) 465 x 238 x 515 mm
Weight 44.3 kg


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