NAC 552

The Naim NAC 552 is a 2-box preamplifier from the flagship 500 Series. Its power supply is housed in a separate enclosure to improve control of electromagnetic interference, while a split-rail configuration almost entirely eliminates power supply noise in the signal earth.

The sound-critical electronics are mounted on a brass sub-chassis suspended on coil springs at a frequency below the threshold of human hearing. This isolates the circuitry and minimises the effects of vibration on the highly sensitive electronic components. Precision rotary potentiometers with carefully selected precious metal wipers preserve music integrity and provide long-term stability.

Six inputs can be selected from the NAC 552’s front panel or remote control. Alongside the DIN inputs, which are preferred for their earthing and impedance matching, 2 inputs can be configured for RCA phono connectors. This allows the use of alternative components with pre-owned interconnects.

The separate power supply enclosure and suspended internal construction form the basis of the NAC 552’s 2-box design, with the power supply components isolated from the audio circuitry.