The NAD M12 Stereo Preamplifier is a direct digital preamplifier that offers high performance with a 35-bit data path and various input options. It also includes a pure Class-A buffer and tone controls for a new level of precision in the digital domain. NAD M12 Stereo Preamplifier Direct Digital Preamplifier Built for the Future. NAD Direct Digital™ Innovation Direct Digital™ amplification offers the highest level of performance. The 35-bit data path with 24-bit coefficients and 62-bit accumulation, and dithered truncation back to 35-bits after DSP functions guarantee the overall 24-bit accuracy. With this degree of resolution, all preamp functions can be accomplished with a new level of precision all in the digital domain. Because of the super high resolution, even 24-bit files are processed without truncation or loss of information. Uncompromised Connection Standard inputs include AES/EBU, Asynchronous 24/192 USB, coaxial and optical digital inputs and balanced and single-ended line level inputs including a high performance MC/MM phono stage. Rounding out the picture, a pure Class-A buffer using the latest generation of Super OP Amps provide low impedance balanced and single-ended connections to power amplifiers or active loudspeakers. A remote controls all functions and IR repeaters, 12V triggers, and a serial port to make integration with advanced control systems a snap. Connections Line Level Input Input Impedance 56 kilohm + 220pF Input Sensitivity 40mV (ref. 500mV out) Maximum Input Signal >8Vrms Signal/Noise Ratio, A-weighted >90dB (ref. 500mV in 500mV out, volume set to unity gain >80dB (ref. 2V out, Volume maximum) Channel Separation >70dB (ref. 1kHz/10kHz) Frequency Response ±0.3dB (ref. 20Hz-20kHz, Tone Controls – On) ±0.3dB (ref. 20Hz-20kHz, Tone Controls – Off) Frequency Response (subwoofer out) 10-200Hz (ref. -3dB) Output Maximum Output Level >8Vrms into 600 Ohms THD (CCIF IMD, DIM 100) >0.005% (ref. 20Hz-20kHz, 2V out) Balanced >2Vrms Standby Mode 75dB (ref. 1/3 rated power, 10kHz 4 Ohms) Weights & Dimensions Gross Unit Dimensions* (WxHxD) 435 x 133 x 383mm (17 1/8 x 5 1/4 x 15 1/8″) Net Weight 8.1kg (17.9lb) Shipping Weight 14.5kg (32lb) *Gross dimensions include feet, extended buttons and rear panel terminals
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