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552 PS Power Supply

552 PS
  • 552 PS
  • 552 PS
  • 552 PS
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The 552 PS is the dedicated external power supply for the NAC 552 preamplifier. Power supply design has always been at the heart of Naim research and this project was no exception. For the NAC 552 a radical new split rail power supply configuration has been employed that almost eliminates power supply noise in the signal earth. Housed in a separate, full-width brushed aluminium case, the power supply features a massive 800VA toroidal transformer, three enormous smoothing capacitors and fourteen hand selected power regulators that independently supply the different stages of the preamplifier.

Naim Discrete Regulator

The 552 PS was updated in 2012 as a result of a two year project to develop a new discrete regulator (DR) for Naim power supplies. The new Naim DR now features, alongside improvements to the wire routing, mechanical decoupling and internal layout. These improvements, developed through intensive listening tests, significantly raise performance and make music even more communicative and enjoyable.

For more technical detail on the new Naim Discrete Regulator please read the white paper available.

Mains Supply 100V, 115V, 230V; 50 or 60Hz
Dimensions 87 x 432 x 314mm (H x W x D)
Front Brushed and black anodised
Case Brushed and black anodised


Here is a selection of reviews that have been written about this product. Where PDF downloads or online links are available to us, they are featured.

  • Hi-Fi Critic - November 2012

    "Based on 552 PS experiences, the DR upgrade will be a real game-changer for Naim users, adding a genuine ‘high end’ dimension to already well established virtues."


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