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Naim Audio NAC 552

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The NAC 552 is by some distance the most advanced Naim preamplifier ever and has some claim, therefore, to being the best preamplifier, period. The introduction of the NAP 500 in 2000 brought with it a new level of technical and musical performance. A Naim design project group began reviewing the existing preamplifier designs exploring possibilities for major design improvement over the then existing reference preamplifier: the Naim NAC 52.


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Naim Audio NAC 552 front

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Full Description

Our preamplifiers epitomise everything we believe in. Starting with our revolutionary NAC 12 back in 1974, Naim preamplifiers have both rewritten the rules and set the standards for others to follow. The NAC 552 is second only to our Statement NAC S1: its distinctive two-box configuration marks it out from the competition just as surely as its unfettered musicality reflects our core values. It's one of the best preamplifiers we’ve ever produced, and by extension, among the best in the world.

Technology & Craft

Like every component in our flagship 500 Series range, the NAC 552 has been developed without compromise or constraint. Its two-box design, which houses the power supply components in a separate enclosure to better control electromagnetic interference, is classically Naim. By contrast, the power supply itself employs radically new thinking, including a new split-rail configuration that almost entirely eliminates power supply noise in the signal earth.

The sound critical electronics of the NAC 552 are mounted on a brass sub-chassis which is fully suspended on coil springs at a frequency below the threshold of human hearing. This method of suspension maximises isolation, hence minimizing the effect of vibration on the highly sensitive electronic components. Carefully selected precision rotary potentiometers with precious metal wipers are used to preserve music integrity and ensure long-term stability.

Six inputs on the NAC 552 can be selected directly from either the front panel or the remote control. In addition to the usual DIN inputs, preferred for their superior earthing and impedance matching, the NAC 552 owner can configure two of the inputs for use with the more common RCA phono type connectors, enabling the use of alternative components with pre-owned interconnects.


    Two-box configuration for optimum rejection of electromagnetic interference
    Split-rail power supply featuring 800VA toroidal transformer, three smoothing capacitors and new Discrete Regulator (DR)
    Fully suspended sub-chassis for superior isolation of sensitive circuit boards
    AV bypass mode for simple connection to an existing AV system
    Support for both DIN and RCA inputs to facilitate connection into a wider range of systems
    Independent listen and record banks for maximum flexibility
    Assignable inputs for enhanced usability with a range of sources


Naim Audio Pre-Amplifier reference Manual


Naim Audio R-Com Manual


Naim Audio Connections Guide (2105 version)




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Audio Inputs

7 x DIN, 2 x RCA

Input Sensitivity


Input Impedance


Other Inputs

Two inputs configurable for unity gain

Audio Outputs
Audio Outputs

1 x variable, 3 x fixed (DIN)

Line Outputs Fixed (level)

75mV, 600Ω

Line Outputs Variable (level)


Output Impedance


Load Impedance

10kΩ (min.)

Power Outputs

Naim phono amplifier

Remote Control

Infra Red (RC5)


Optional (DE9 female)

Remote Input

RCA on rear (RC5)

User Control
Front Panel

Volume control, balance control, sixteen button matrix 


NARCOM-4 Remote Control

Supply Voltage

+/-12V, 24V, 32V

Power Supply Options

552 PS

Power Supply

552 PS

Dimensions (HxWxD)

87 x 432 x 314 mm


12.9 kg

Supplied with

552 PS, Power-Line, R-Com and Burndy


Brushed and black anodised


Brushed and black anodised