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Accuphase PS-550
Accuphase PS-550
Accuphase PS-550
Accuphase PS-550

Description

The Accuphase PS-550 is a high-end power supply unit that acts as a distributor, filter, and mains stabilizer, reshaping the waveform of the current feeding the system in real time. The heart of the project is the proprietary Waveform Shaping technology : the incoming signal is compared instant by instant with an ideal reference waveform, thus compensating for deficiencies and removing artifacts and impurities with a harmonic distortion equal to or less than 0,08%. It is therefore not a simple passive filter, but a true current regenerator designed for high-end audio.

Signal clarity is achieved through a three-stage architecture. The first is a line filter that eliminates interference; the second uses a shielded toroidal transformer to eliminate common-mode noise; the third reshapes the waveform via the Reference Signal Generator circuit , with a two-stage bandpass filter against out-of-band signals and a six-stage filter for unwanted harmonics. The output stage is based on a power amplifier with ten bipolar transistors driven in parallel in a complementary push-pull configuration , capable of delivering high current peaks while maintaining a low output impedance.

For those wondering how to improve the power quality of a hi-fi system, the PS-550 offers a concrete answer: output voltage stabilized even in the face of mains fluctuations of up to ±10%, a robust power supply with a toroidal transformer and 22.000 µF/90 V filter capacitors, and a highly sensitive protection circuit that safeguards both the unit and the connected components. Cooling is entirely passive, without fans, for perfectly silent operation.

The front panel features a color LCD display that shows real-time waveform, voltage, distortion, and power output for both input and output. The rear panel features six power outlets (three Schuko and three Type-C bipolar), enough to power sources, DACs, preamplifiers, and power amplifiers. The successor to the PS-530, the PS-550 is aimed at those who want to understand the real difference between a common mains filter and a superior power regenerator, ensuring clean and stable power to every component.

Specifications

Electricity consumption 510 W
Dimensions (WxHxD) 465 x 181 x 396 mm
Weight 24 kg
Trim black
country of origin Japan
Harmonic Distortion (THD) 0.08%

About the brand

Accuphase is a Japanese brand specializing in integrated amplifiers, power amplifiers, and CD players that focus on linear frequency response and stable playback over time. They serve those seeking reliable components for mid- and high-end stereo systems, without compromises in construction, and who want to avoid distortion even during prolonged listening sessions.

To choose the right model, evaluate the nominal power in relation to the speakers (the E-470 and AD-60 integrateds cover different needs), the quality of the D/A converter if you use digital sources, and the compatibility with the rest of the chain. Audiocostruzioni carries the entire Accuphase range along with over 70 other brands: you can listen to the components in the Carpi listening room, receive advice on matching and choose between new, guaranteed used and ex-demo based on your budget.

Clear up any doubts

Find out more on our blog

Visit Accuphase in Yokohama: Inside the Japanese Hi-Fi Factory

Visiting Accuphase in Yokohama means entering one of the most representative places of Japanese Hi-Fi.

A company that has remained true to itself

Accuphase was founded in 1972 under the name Kensonic Laboratory, immediately establishing the Accuphase brand. In 1973, the company moved to Yokohama, where it remains today.

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Accuphase
PS-550

New
12.000  *

Availability

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