Naim NAC 552

NAC 552 Performance without limits.   OVERVIEW Our preamplifiers epitomise everything we believe in. Starting with our revolutionary NAC 12 back in 1974, Naim Audio 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.   Features 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 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 Audio. By contrast, the 552 PS DR power supply itself employs radically new thinking, including a new split-rail configuration that virtually 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. The NAC 552’s six inputs 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.   REVIEW & AWARDS Naim NAC 552 preamplifier - Read More "Most important, the sonic vision of the Naim designers was clear and coherent, and they delivered what they set out to achieve—the NAC 552 provided an exceptionally coherent and cohesive sonic, and especially musical, picture. Add to that its high build quality, convenience, flexibility, and, for the most part, glitch-free performance, and you have an expensive product that, when you look at, touch, and hear it, quickly lets you know you're in the presence of audiophile greatness." - Michael Fremer  SPECIFICATIONS  Audio Inputs Other Inputs Two inputs configurable for unity gain Input Impedance 47kΩ Analogue Input 7 x DIN, 2 x RCA Input Sensitivity 75mV Audio Outputs Audio Outputs 1 x variable, 3 x fixed (DIN) Line Outputs Variable (level) 775mV Line Outputs Fixed (level) 75mV, 600Ω Load Impedance 10kΩ (min.) Output Impedance <50Ω Power Outputs Naim phono amplifier Connectivity RS232 Optional (DE9 female) Remote Input RCA on rear (RC5) Finish Case Brushed and black anodised Front Brushed and black anodised Physical Dimensions 87 x 432 x 314 mm Weight 12.9 kg Power Power Supply Options 552 PS Supply Voltage 552 PS Supplied with Supplied with 552 PS, Power-Line, R-Com and Burndy Upgrades Power Supply 552 PS User Control Remote Control Infra Red (RC5) Front Panel Volume control, balance control, sixteen button matrix Handheld NARCOM-4 Remote Control 552 PS Audio Outputs Power Outputs 7 x +/-12V, 1 x 12V, 2 x 24V, 1 x 31V Finish Case Brushed and black anodised  Front Brushed and black anodised  Physical Shipping Weight 17.5 kg Shipping Dimensions 240 x 590 x 500 mm Dimensions (HxWxD) 87 x 432 x 314 mm Power Mains Supply 100V, 115V, 230V; 50 or 60Hz Supplied with Supplied with R-Com, Power-Line, SNAIC