Description
Condition: Very good. Some light scratches on the top and a small scratch on the top edge of the faceplate. Includes power cord, manual, and remote. No original box.
About the NAD M51 Masters Series Direct Digital DAC
The NAD M51 is a groundbreaking digital-to-analog converter from NAD’s flagship Masters Series. Rather than using conventional DAC chips, the M51 employs NAD’s proprietary Direct Digital feedback architecture, which converts the incoming digital signal directly into an analog output using a 35-bit / 844kHz signal path. This approach virtually eliminates jitter and provides exceptionally low distortion, resulting in a remarkably transparent and musical presentation.
With its extensive connectivity and reference-grade performance, the M51 served as the digital heart of many high-end systems and remains highly regarded today for its neutral, detailed, and natural sound.
Key Specifications
- Architecture: 35-bit / 844kHz Direct Digital feedback DAC
- Inputs: HDMI (x2 in, 1 out), Coaxial S/PDIF, Optical (TosLink), AES/EBU (XLR), USB Type B (asynchronous)
- Supported Sample Rates: Up to 24-bit / 192kHz (S/PDIF, AES, USB)
- Outputs: Balanced XLR and Single-Ended RCA analog outputs
- Variable output level with digital volume control (can be used as a digital preamplifier directly into a power amp)
- THD + N: <0.003%
- Signal-to-Noise Ratio: >120 dB (A-weighted, ref. 2V)
- Dynamic Range: >120 dB
- Dimensions: 17-1/8″ W x 2-3/4″ H x 13-1/8″ D
- Weight: approx. 22 lbs
