C 399 Hybrid Digital DAC Amplifier with MDC2 BluOS-D Module Installed

C 399 Hybrid Digital DAC Amplifier with MDC2 BluOS-D Module Installed As the new flagship of NAD’s Classic series of integrated amps, the...

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Brand NAD
Type Amplifiers
Tags Amplifier, Bluetooth, DAC

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  • C 399 Hybrid Digital DAC Amplifier with MDC2 BluOS-D Module Installed
  • C 399 Hybrid Digital DAC Amplifier with MDC2 BluOS-D Module Installed
  • C 399 Hybrid Digital DAC Amplifier with MDC2 BluOS-D Module Installed
  • C 399 Hybrid Digital DAC Amplifier with MDC2 BluOS-D Module Installed
  • C 399 Hybrid Digital DAC Amplifier with MDC2 BluOS-D Module Installed
  • C 399 Hybrid Digital DAC Amplifier with MDC2 BluOS-D Module Installed

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C 399 Hybrid Digital DAC Amplifier with MDC2 BluOS-D Module Installed

As the new flagship of NAD’s Classic series of integrated amps, the C 399 Hybrid Digital DAC Amplifier takes NAD’s commitment to lasting value and sonic excellence to a whole new level.

The C 399 employs NAD’s Hypex HybridDigital nCore amplifier circuitry, which until now has been available only on Masters Series amplifiers. Its digital section is built around a 32-bit/384kHz ESS Sabre DAC, the same chip used in NAD’s acclaimed M10 and M33 Masters Series amplifiers.

The C 399 is the first amplifier to incorporate the latest generation of NAD’s Modular Design Construction (MDC) technology. MDC2 lets users add optional modules that provide functions such as BluOS multi-room music streaming and Dirac Live room correction.

Perfect Power

Trickled down from NAD’s Masters Series, the C 399’s HybridDigital nCore amplifier can deliver 180 Watts per channel continuous power, and 250 Watts per channel instantaneous power. Highly efficient and remarkably powerful, the HybridDigital nCore amplifier can produce musical transients effortlessly.

The design is renowned for its wide bandwidth, flat frequency response, clean clipping behaviour with instant recovery, high current capability, and stability into demanding low-impedance speaker loads. Noise and distortion are vanishingly low under all operating conditions. The minute levels of harmonic distortion are dominated by sonically benign second and third harmonics.

The Hypex nCore design enables the C 399 to produce neutral, distortion-free sound even at very high listening levels, with exquisite detail, superb portrayal of space, and thrilling dynamics.

Also trickled down from the Masters Series is the ESS Sabre 9028 high-resolution DAC, a design noted for near-zero levels of clock jitter, ultra-low noise and distortion, and wide dynamic range. This premium DAC enables the C 399 to reproduce all your digital sources with amazing musicality, stunning clarity, and precise soundstaging.

Future Proof

In 2007, NAD introduced Modular Design Construction, an innovative architecture for adding new functions to existing components. Many NAD products have rear-panel slots for MDC modules that perform HDMI switching, BluOS multi-room music streaming, Dolby Atmos surround processing, and other functions.

The C 399 is the first product to feature NAD’s new MDC2 architecture. By enabling two-way communications between the module and component, MDC2 opens up the future for new upgrades.

Equipped with Wi-Fi and Ethernet, the optional MDC2 BluOS-D module lets listeners play music from their favourite streaming services through the C 399, using the acclaimed BluOS Controller app for Android, iOS, macOS, and Windows.

Like all BluOS-enabled products, the MDC2 BluOS-D has integrated support for dozens of streaming services; and supports Apple AirPlay 2, Spotify Connect, and Tidal Connect. Two-way communications also enable the MDC2 BluOS-D to stream music from sources connected to the C 399 to BluOS-enabled components in other rooms.

The Dirac Live function lets you measure your room’s acoustics using a supplied microphone and intuitive app, and then upload correction curves to the MDC2 BluOS-D. By compensating for acoustic anomalies in your listening environment, Dirac Live dramatically improves bass clarity, imaging, and timbral accuracy.

Thanks to its two-way architecture, the MDC2 BluOS-D performs room correction for all sources connected to your C 399.

Everything’s Connected

The C 399 can accommodate all your digital and analogue sources. Its MM phono stage delivers ultra-precise RIAA equalization, extremely low noise, and high overload margins. The phono preamp also features an innovative circuit that suppresses the infrasonic noise present on all LPs, without compromising bass response. There are two sets of line-level line inputs, with low-noise buffer amplifiers to prevent sonic degradation.

The C 399 has two optical and two coaxial digital inputs, plus an HDMI-eARC port for playing audio from a connected TV, while controlling amplifier output with the TV’s remote control.

In addition to two sets of speaker outputs, the C 399 has preamp output jacks and dual subwoofer outputs. Two-way apt-X HD Bluetooth allows 24-bit streaming from mobile devices, and high-quality output to Bluetooth headphones.

Also built-in is a dedicated headphone amplifier with low output impedance and high output voltage capability, enabling the C 399 to drive demanding high-impedance studio monitor headphones.

A Timeless Classic

As with every NAD amplifier ever made, the C 399 gets the basics right: a precise volume control with accurate channel balance, low-noise circuits, and correct input and output impedances. But it goes far beyond the basics. With its HybridDigital nCore output stage and high-resolution ESS Sabre DAC, the C 399 can reproduce all your digital and analogue sources with a level of excitement and refinement that is unprecedented for a Classic-series integrated amplifier.

Thanks to NAD’s innovative MDC2 platform, the C 399 will keep pace with future developments. Essentially, MDC2 makes obsolescence obsolete. The C 399 can serve as the hub of a world-class music system today, and for years to come. With NAD’s C 399 HybridDigital DAC Amplifier, the legend continues.





  • Hybrid Digital nCore Amplifier
  • Continuous Power: 180 Watts per channel into 8/4 ohms
  • Instantaneous Power: 250 Watts per channel
  • Vanishingly low harmonic and intermodulation distortion
  • Dual MDC2 Ports for expanded functionality
  • Optional MDC2 BluOS-D module adds BluOS multi-room streaming and Dirac Live room correction
  • Jitter-free 32-bit/384kHz ESS Sabre DAC
  • Ultra-low-noise MM phono stage with infrasonic filtering circuitry
  • Two optical, two coaxial digital inputs
  • HDMI-eARC input
  • Two pairs of line-level analogue inputs with low-noise buffer amplifiers
  • Speaker A/Speaker B outputs
  • Two-way aptX-HD Bluetooth
  • Dual subwoofer outputs
  • Dedicated headphone amplifier
  • IR remote
  • 12V Trigger in/out
  • IR in/out
  • RS-232 Serial port for control integration with home automation systems
  • Control4, Crestron, RTI, URC, AMX, Savant, Elan certified



Line In, Speaker Out (Analog bypass on)
Continuous output power into 8 ohms and 4 ohms>180W (ref. 20 Hz-20 kHz at rated THD, both channels driven)THD (20 Hz – 20 kHz)<0.02% (250 mW to 180 W, 8 ohms and 4 ohms)Signal/Noise Ratio>95 dB (A-weighted, 500 mV input, ref. 1 W out in 8 ohms)Clipping power210W (at 1 kHz 0.1 % THD)IHF dynamic power8 ohms: 217 W4 ohms: 400 W2 ohms: 506.4 WPeak output current>26 A (in 1 ohm, 1 ms)Damping factor>150 (ref. 8 ohms, 20Hz to 6.5kHz)Frequency Response±0.3 dB (20 Hz – 20 kHz)Channel Separation>90dB (1 kHz)>75dB (10 kHz)Input sensitivity (for 180 W in 8 ohms)Line In: 201 mVDigital In: 10.25% FS

Line Input, Pre Out (Analog bypass on)
THD (20Hz-20kHz)<0.002 % at 2 V outSignal/Noise Ratio>106dB (IHF; A-weighted, ref. 500 mV out, unity gain)Channel Separation>100dB (1 kHz); >90 dB (10 kHz)Input Impedance (R and C)56 kohms + 100 pFMaximum Input Signal>4.6 Vrms (ref. 0.1 % THD)Output ImpedanceSource Z + 320 ohmsInput Sensitivity65mV (ref. 500 mV out, Volume maximum)Frequency Response±0.3 dB (20 Hz – 20 kHz)Maximum voltage output – IHF load>>5 V (ref. 0.1 % THD)

Phono Input, Pre Out (Analog bypass on)
THD (20Hz-20kHz)<0.01% at 2 V outSignal to Noise Ratio>84dB (200 ohms source; A-weighted, ref. 500 mV out)Input Impedance (R and C)46 kohms/100 pFInput Sensitivity1.08mV (ref. 500 mV out, Volume maximum)Frequency Response*±0.3 dB (20 Hz – 20 kHz)Maximum Input Signal at 1kHz>80 mVrms (ref. 0.1 % THD)

Line Input, Headphone Out (Analog bypass on)
THD (20Hz-20kHz)<0.005% at 1V outSignal/Noise Ratio>107 dB (32 ohms loads; A-WTD, ref. 1V out, unity gainFrequency Response±0.3 dB (20 Hz – 20 kHz)Channel Separation>62 dB at 1kHzOutput Impedance2.2 Ohms

General Specifications
Supports bit rate/sample rateup to 24 bit/192 kHzFrequency band2.402G- 2.480GMaximum transmit power (dBm)7 dBm ± 2 dBm

Weight & Dimensions
Gross dimensions (W x H x D) **435 x 120 x 390mm(17 1/8 x 4 3/4 x 15 3/8)”Net Weight11.2kg (24.7lb)Shipping Weight13.6kg (30lb)


About MDC2 BluOS-D Module 

First module in NAD’s second generation MDC2 Modular Design Construction future-proof architecture features Dirac Live Room Correction, BluOS High-Res Music Streaming and More

The MDC2 BluOS-D is the first expansion module offered by NAD that adds Dirac Live room correction*to a two-channel component. Owners use the supplied calibrated microphone and intuitive Dirac Live app to analyze their room’s acoustics, and then upload correction filters to the MDC2 BluOS-D module. The MDC2 BluOS-D module can store up to five Dirac profiles for different listening positions and room conditions—for example whether the drapes are open or closed.

As well as correcting peaks and dips in frequency response, Dirac Live optimizes impulse response by learning how sounds reflect off various surfaces in the listening space. The result is dramatically improved bass clarity, imaging, and timbral accuracy, on music and movie soundtracks.

The MDC2 BluOS-D module also features BluOS high-resolution music streaming. Available for iOS, macOS, Android, and Windows, the flexible BluOS Controller app provides access to hundreds of internet radio stations and more than 20 streaming services. Like all BluOS products, the MDC2 BluOS-D module supports high-resolution playback up to 24-bit/192kHz, as well as MQA.

With the MDC2 BluOS-D module, users can share music from any source connected to the host component with up to 63 BluOS-enabled components on the same network. Playback can also be controlled by Alexa or Google voice commands, and from smart home control systems from Crestron, Control4, Lutron, RTI, and others.

Not only does the MDC2 BluOS-D module include the latest Wi-Fi and Ethernet protocols, but it also supports Apple AirPlay2, Spotify Connect, and Tidal Connect, and incorporates two-way Qualcomm aptX HD Bluetooth. There’s also a USB port for playing music from a connected USB drive.

With an MDC2 BluOS-D module installed, MDC2-capable components can play music from a vast range of local, networked, and cloud-based sources. And thanks to its bidirectional communications architecture, MDC2 is ready for technology upgrades that have yet to be conceived.


  • Dirac Live Room Correction*
  • Calibrated microphone included for Dirac setup
  • Wi-Fi and Ethernet networking
  • BluOS music streaming to up to 63 zones
  • Support for hundreds of internet radio stations and over20 streaming services
  • High-res audio to 24-bit/192kHz
  • MQA decoding and rendering
  • Apple AirPlay 2 and Siri voice control
  • Amazon Alexa and Google Assistant voice control
  • Spotify Connect and Tidal Connect
  • Two-way (send/receive) Qualcomm aptX HD Bluetooth


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