NAD M51 DAC and Pre Amplifier

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RRP: £1499.00 (Save: £70.00)

£1429.00 Free UK Delivery

or £95.27/month on 0% Finance (12 months) after an initial 20% deposit

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Product information

NAD M51 is a direct digital DAC and pre amplifier featuring the same Direct Digital technology featured in the NAD M2 amplifier, unique for both its precision and speed. Instead of using the Direct Digital processor to drive a high power output stage, NAD employ a line level analogue output that will perfectly interface with any analogue system with the M51 Direct Digital DAC.

The M51 is a perfect choice for enjoying high res files stored on your computer, NAS drive or for upgrading your CD player or any other digital source with an appropriate digital output. With this DAC costing less than a third of the M2 amplifier, the M51 gives you access to NAD's stunning Direct Digital technology and represents fantastic value for money.

Reviews

'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 Hi-Fi magazine)

'This flexible DAC will bring great results for any upmarket system...open, transparent sound; immense levels of detail; realistic balance; extensive connectivity; large, legible display' (What Hi-Fi magazine)

'Music sounds wonderfully clear and transparent. 50 Cent’s In Da Club is powerful and robust, with the solid-sounding bassline acting as a rigid backbone...the Manic Street Preachers’ Motorcycle Emptiness sounds engaging and communicative with an excellent sense of precision to the drums and a crisp, natural tone to the guitar melodies' (What Hi-Fi magazine)

'The M51 can detail and sonic textures cheaper DACs struggle to convey, and this is as true when listening to 16-bit/44.1kHz CD playback as it is when indulging in a 24-bit/192kHz high-res file' (What Hi-Fi magazine)

How does Direct Digital work?

NAD's technology uses a very powerful processing engine that operates at much higher speed and with much greater accuracy than typical Digital-to-Analogue 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.

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; again, offering state-of-the-art performance in this most important parameter. Due to the very high clock speed and mathematical precision of NAD reconstruction filters, the resulting audio signal is totally free of digital artifacts like ringing. A Pure Class A analogue stage with very low output impedance provides the perfect interface to your favourite amplifier. Also, both balanced and single-ended outputs are available.

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 theatre 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.

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 analogue 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.

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. Serial control is available via RS-232 IR and 12V trigger inputs allow the M51 to fully integrate with advanced automation systems.

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. All this innovation, performance and flexibility come with NAD's legendary sound quality and affordability.

Specifications

- 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)
- Digital Inputs: XLR (AES/EBU),
SPDIF Coaxial, Optical, HDMI x 2 (stereo only)
- USB Audio Codec 2.0: asynchronous 24/192 support
- HDMI Video Out: (3D video pass through)
- Analogue Unbalanced: 47 ohms
- Analogue Balanced: 110 ohms
- AC Supply: 100-240V AC ~ 50/60Hz
- Standby Power: <0.5W
- Idle Power: 16W
- Unit Dimension (WxHxD): Gross* 435 x 78 x 296mm 17 1/8 x 3 1/8 x 11 11/16 inches**
- Net Weight: 5.8kg (12.8lb)
- Shipping Weight: 9.8kg (21.6lb)