555PS DR


Naim Audio’s reference 555PS DR is the ultimate power supply upgrade. Originally designed to partner the legendary CD555 reference CD player, 555PS now benefits from Naim’s DR (Discrete Regulation) technology. The 555PS can be used as an upgrade with CD555, NDX/NDX2, NDS network players, DAC and CDX2 CD Player. And of course is the only choice with Naim’s reference ND555 network player. The only question is one or two?

Dimensions:  87 x 432 x 314 mm (H x W x D)
Weight:  15.7 kg

In-store purchase only, please call 0141 221 0221 or email glasgow@loud-clear.co.uk to reserve/enquire.

555 PS DR – The ultimate upgrade

Not everyone sees hi-fi as Naim Audio does. For Naim, 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 Naim’s reference 555 PS DR, the best power supply in the Naim portfolio.

Originally designed to partner the world-class CD555 CD player, the 555 PS can also be used with NDS and NDX network players, HDX hard disk player/ server and 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

Technology & Craft
The 555 PS benefits from both decades of experience and Naim’s relentless pursuit of superior sound quality. Its massive transformer, some 40 percent larger than that fitted to the 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 the Naim 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.

Naim Audio 555PS

Technical Specifications:

Case – Brushed and black anodised
Front – Brushed and black anodised

Power Outputs
± 22V, ± 10V, 12V, 2 x 15V

Shipping Dimensions – 240 x 590 x 500 mm
Weight – 15.7 kg
Product Dimensions (HxWxD) – 87 x 432 x 314 mm

Mains Supply – 100V, 115V, 230V; 50 or 60Hz

Supplied with