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NAD ELECTRONICS NAD - M51 Direct Digital DAC

DAC

$1,999.00
23Reward Points
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Availability: In Stock (2)
Item: ANADM51SLV
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Description

NAD M51 Direct Digital DAC

The Award-Winning NAD M51 is a 35-bit/844kHz Reference DAC and Digital Preamp

One of the Best Values in The World at This Price

NAD's Direct Digital technology is unique in both its extreme precision and in its speed. This advancement was first introduced in the NAD M2 Direct Digital Amplifier to worldwide acclaim. Now this innovative Direct Digital technology is available as a standalone DAC in the M51 Direct Digital DAC. Instead of using the Direct Digital processor to drive a high power output stage, M51 employs a line level analog output that will perfectly interface with any analog system.

"I'm truly amazed at the performance of this $2,000 DAC. It is state-of-the-art in design, but more importantly, also in performance. Its unique HDMI input, which displayed incredibly low distortion, makes this product a must-consider if you are thinking about purchasing an outboard DAC."
– John E. Johnson, Jr., Secrets of Home Theater and High Fidelity

How Direct Digital Operates
NAD's technology uses a very powerful processing engine that operates at much higher speed and with much greater accuracy than typical Digital-to-analog converters. Running at 108MHz, the M51 resamples the incoming pulse code modulated (PCM) signal and converts it to a pulse width modulation signal (PWM) with a sampling rate of 844kHz. Operating in a differential mode with double precision, the M51 has state-of-the-art specifications for low noise and freedom from distortion. The extreme headroom afforded by the 35-bit architecture allows for a DSP-based volume control that does not reduce resolution. Even with 24-bit high definition signals, the output can be attenuated by 66dB (very, very quiet) before bit truncation begins.

"NAD effortlessly captures the silky shine of the violin, a sound not unlike a really fine wine - full of complexity and tonal depth, rounded and smooth with no brittleness to it. For its ability to beguile and seduce tonally, and in particular its ability to capture the human voice, it is well worth an audition."
– Rafael Todes, HiFi World

Pure Performance
The incredible precision of the M51's processing engine gives music a vibrancy and transient accuracy that must be heard to be appreciated. The conversion process from PCM to PWM completely eliminates any jitter present on the incoming signal. Due to the very high clock speed and mathematical precision of the reconstruction filters, the resulting audio signal is totally free of digital artifacts like ringing. A Pure Class A analog stage with very low output impedance provides the perfect interface to your favorite amplifier. Also, both balanced and single-ended outputs are available.

"The NAD M51 succeeds with a wonderfully detailed and revealing sound best described as honest, with a friendly smile. And it was a pleasure to listen to."
– Jon Iverson, Stereophile

Next Generation Connectivity
While the M51 includes the industry standard SPDIF, AES/EBU, Optical and Coaxial inputs, it also includes the latest USB technology called USB Audio Class 2. USB Audio Class 2 supports sample rates of 192kHz releasing the previous limitation of USB at 96kHz. A device USB port is included allowing direct connection of a PC or Mac.

The M51 offers two HDMI inputs and one output with video pass through. This opens up the possibility of using the M51 Direct Digital DAC as the heart of a "Video 2.0" system using the mandatory two-channel linear PCM soundtrack from Blu-ray or DVD to make a compelling two-channel high definition theater presentation. Many symphony orchestras and some specialty music labels are also released in HD recordings on Blu-ray or DVD. The M51 is fully 3D video compatible but there is no surround sound decoding or video processing.

"The M51 sounds sensational. In fact, we'd go further than that by saying it's one of the best NAD separates we've heard in recent memory."
What HiFi?

More than Just a DAC
M51 is a fully functional digital preamp with seven digital inputs and one of the world's best volume controls. As a 'preamp' it is totally noise and distortion free because all switching and volume control is done in the digital domain. There are no analog circuits except for the Class A buffer at the output of the DAC. While input selection is available from a front panel control, volume can only be selected via remote control. The supplied IR remote also features controls for NAD's matching M50 Digital Music Player. Serial control is available via RS-232 IR and 12V trigger inputs allow the M51 to fully integrate with advanced automation systems.

The M51 introduces many 'firsts' for the DAC product category: first to support HDMI, first to support USB Audio Class 2 with support for 192kHz, the first to use digital error correction, and the first 35-bit architecture to be found in a DAC. Whether you want to get into computer audio, 'Home Cinema 2.0' or just want to upgrade your CD player, the M51 Direct Digital DAC will get the best possible performance from every digital format.

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Rated Distortion (THD+N with AES 17 filter): <0.0005% (0dBFS)
IMD Distortion: 0.0001%
Signal/Noise Ratio: <-125dB (ref. 0dBFS 2V out)
Channel Separation: >-115dB (ref. 0dBFS Volume -1dB)
Sample Rate: 32kHz to 192kHz (USB and digital S/PDIF)
Frequency Response: ±0.5dB (ref. 20Hz - 96kHz sample rate)
Output Level: 2V (ref. input 0dBFS)
Inputs: XLR - AES/EBU, S/PDIF Coaxial, Optical, HDMI x2, USB
USB Audio Codec 2.0: asynchronous 24/192 support
Outputs:
    HDMI Video Out (3D video pass through)
    Unbalanced: 47 ohms
    Balanced: 110 ohms
AC Supply: 100-240V AC ~ 50/60Hz
Standby Power: <0.5W
Idle Power: 16W
Dimensiona (WHD): 17 1/8" x 3 1/8" x 11 11/16"
Weight: 21.6 lbs.

Warranty: User Interfaces - one year parts and labor to the original purchaser. Three years parts and labor to the original purchaser on all other products

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User Manual (PDF, 761 KB)


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