NAD M51 aluminum

More than just a digital-to-analog converter, the NAD M51 is a true preamp equipped with six digital inputs, including two HDMI and most notably a USB audio class 2 port compatible with 192 kHz.

Operating entirely in the digital domain, the volume control does not affect the signal dynamics in any way and maintains perfect left/right balance, without the slightest distortion or unwanted noise. Absolute purity.

• 844 kHz/35-bit PWM converter
• Class A circuit for analog output

Measurements

• Analog output level
  • 2 V (unbalanced output)
  • 4 V (balanced output)
• Frequency response: 20 Hz - 96 kHz (192 kHz signal)
• Total harmonic distortion: < 0.001% (1 kHz)
• Signal-to-noise ratio: 123 dB (1 kHz)
• Dynamic range: 130 dB
• Channel separation: > 115 dB
• Digital compatibility
  • 32 to 192 kHz (via USB and HDMI)
  • 32 to 96 kHz (via optical, coaxial, and AES/EBU)
• Unmeasurable jitter
• Volume adjustable in the digital domain
• Can function as a digital preamplifier

Connectivity

• HDMI: 2 inputs and 1 output
• Balanced stereo output (XLR)
• Unbalanced stereo output (RCA)
• Digital inputs: AES/EBU, optical, and coaxial
• USB audio class 2 port (192 kHz compatible)
• RS-232 port
• Infrared (IR) input
• 12 V trigger input

General

• Standby power consumption < 0.5 W
• Dimensions (W x H x D): 435 x 78 x 296 mm
• Weight
  • Net: 5.8 kg
  • Packaged: 9.8 kg