Accuphase PS-550 Clean Power Supply

Name: Accuphase PS-550 Clean Power Supply
Brand: Accuphase
SKU: ACCPS530
Availability: InStock

Product variants

Amazingly pure energy source

Every audio component draws all of its energy from the power supply which in turn is connected to the AC power grid. The Clean Power Supply components from Accuphase are products that remove noise and impurities from the AC power line through a groundbreaking new approach, resulting in a drastic improvement of the sound and picture quality of connected audio and video equipment. Without relying on an oscillator, the reference waveform is created with further improved accuracy and is linked to the power section by a balanced connection to ensure incredibly low distortion in the output waveform.

Availability

Specifications

Rated output capacity: 510 VA (continuous)

Rated output voltage: 230 V AC ±3.0 V

Rated output current: 2.22 A

Output frequency: 50 Hz or 60 Hz (identical to input frequency)

Instantaneous peak current capacity: 40 A

Output waveform THD: 0.08% or less

AC power outlets: 6 outlets, on rear panel

Rated input voltage: 230 V AC ±10%

Input frequency: 50 Hz or 60 Hz

No-load power consumption: 37 W

Cooling principle: Natural air cooling

Meter:

VOLT-AMPERE: 0-510 VA, Meter function selector LEDs flash when overload occurs

VOLTAGE INPUT/OUTPUT (green zone of scale): 230 V AC ±5%

DISTORTION INPUT/OUTPUT: 0-6%

AUTO-MONITOR: Display cycles automatically from VOLT-AMPERE to DISTORTION OUTPUT, showing each mode for 5 seconds

Maximum Dimensions: Width 465 mm (18.31"), Height 181 mm (7.13"), Depth 386 mm (15.2")

Mass: 24.0 kg (52.9 lbs.) net, 30.0 kg (66.1 lbs.) in shipping carton

Low-distortion reference waveform generator

To generate the 230 V (120 V) sine wave reference signal, the zero-cross point at the secondary winding of a measurement circuit transformer is detected by a comparator and used by the high-precision power supply to generate a square waveform. The square wave then is routed through a newly developed 50/60 Hz band pass filter and a six-stage band elimination filter (BEF). The filter frequency is switched in sync with the input frequency, for automatic 50 Hz and 60 Hz support. By routing the signal through another band pass filter, a low-distortion sine wave (reference signal) is created that is not dependent on the input voltage.

Outstanding power

Figure (a) shows a severely distorted waveform such as commonly encountered in ordinary AC outlets at home. Simple filtering will never be able to bring this waveform back to the intended shape. Figure (b) shows the condition where noise is affecting the AC power. Filtering will be able to remove some of the higher frequency noise components but low frequency components are very difficult to remove. The PS-530 incorporates power waveform shaping technology that uses a clean reference waveform and works in real time to provide exactly the required compensation and remove any unwanted components. Distortion is reliably eliminated and the result is a perfectly clean source of energy.

Who is this for?

The Accuphase PS-550 Clean Power Supply is designed for serious HiFi enthusiasts who want to improve the overall performance of their system by addressing one of the most overlooked elements in audio—mains power quality. It suits listeners who already own high-resolution components and want to reduce noise, improve clarity, and unlock greater consistency from their system.

This unit is particularly well suited to premium integrated amplifiers, pre/power amplifier combinations, digital sources, and phono stages in carefully assembled HiFi systems. By providing cleaner and more stable power, the PS-550 helps lower the noise floor, improve dynamic expression, and enhance overall system coherence.

The PS-550 is ideal for medium to large listening rooms where high-end systems are already revealing enough to benefit from further refinement. It is especially effective in systems where subtle improvements in timing, imaging, and background blackness translate directly into a more immersive listening experience.