Naim Audio 555 PS DR power supply Pre-loved

£7,499.00 £5,250.00

Naim Audio 555 PS DR power supply. Fantastic condition in Classic Finish sleeve.

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What we Say:

The Naim Audio 555 PS DR is the ultimate Naim source upgrade component. It takes what the XPS does and moves performance forward significantly. The Naim Audio 555 PS DR can power a wide range of source components including.

NAC-N-272, Naim CDS2/3, NDX, NDX2, HDX, ND 555, Naim CD 555.  To see how it differs from the XPS.

Naim have increase performance by improving over the XPS DR in several areas. The transformer in the 555 PS is substantially larger and has more secondary windings to supply each power stage individually. The smoothing capacitors which store charge in the 555 Ps are substantially bigger than those in the XPS. They are more like what you would expect in power amplifier. This reduces ripple on the power rails and makes the voltage regulators job of stabilising the voltage easier. The 555 PS DR has 7 DR modules.

The connections on the rear of the Naim Audio 555 PS DR are now split so a separate burndy cable can be used for the analogue and digital sections of certain source components. This applies to the ND555 streamer and also the NDS streamer. It also applies to the CD 555.


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What they say:

555 PS DR

The ultimate upgrade.

Not everyone sees hi-fi as we do. For us, a smooth, stable, low-noise power supply isn’t just desirable: it’s fundamental to proper hi-fi performance. Nowhere is that belief more clearly exemplified than in our reference 555 PS DR, the best power supply in our portfolio.

Originally designed to partner our world-class CD555 CD player, the 555 PS can also be used with our NDS and NDX network players, our HDX hard disk player/ server and our DAC digital to analogue converter as well as the CDX2 CD player. Whatever Naim Audio product it partners, the 555 PS DR will improve every aspect of your favourite music. Voices and instruments become clearer and more natural. Perceived dynamic range increases too, while timing – music’s fundamental sense of rhythm and accuracy – snaps into even greater focus.

  • Seven regulated supply voltages, including a separate supply for the CD555 clock circuit
  • Low-resonance case with isolating feet
  • Massive transformer, 40 percent larger than that fitted to the XPS
  • Supplied with Power-Line mains cable as standard
  • All-new Discrete Regulator (DR) configuration, delivering Naim Audio’s best-ever standards of stable, low-noise power
555 PS Power Supply
555 PS DR Power Supply - Rear View
Technology & Craft

The 555 PS benefits from both our decades of experience and our relentless pursuit of superior sound quality. Its massive transformer, some 40 percent larger than that fitted to our XPS power supply, features five separate windings outputting to seven regulated supply voltages, including an output specifically intended for use with the clock circuitry of our CD555.

The 555 PS was updated in 2012 as a result of a two year project to develop a new discrete regulator (DR) for Naim Audio power supplies. The new Naim Audio DR now features, alongside improvements to the wire routing, mechanical decoupling and internal layout. These enhancements, developed through intensive listening tests, significantly raise performance and make music even more communicative and enjoyable.

A technical white paper on the Naim Audio Discrete Regulator technology is available here.