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NAD Electronics C 399 HybridDigital DAC Integrated Amplifier

BH #NAC399 • MFR #C 399
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NAD Electronics C 399 HybridDigital DAC Integrated Amplifier
Key Features
  • 2.2 Channel Amplifier Configuration
  • HybridDigital nCore Amplifier
  • 180W RMS per Channel into 8 or 4 Ohms
  • Two-Way aptX HD Bluetooth
Enjoy sonic excellence with the C 399 HybridDigital DAC Integrated Amplifier from NAD Electonics. With its HybridDigital nCore output stage and high-resolution ESS Sabre DAC, the C 399 can reproduce all your digital and analog sources with a level of excitement and refinement that is unprecedented for an NAD Classic Series integrated amplifier.
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NAD Electronics C 399 Overview

Enjoy sonic excellence with the C 399 HybridDigital DAC Integrated Amplifier from NAD Electonics. With its HybridDigital nCore output stage and high-resolution ESS Sabre DAC, the C 399 can reproduce all your digital and analog sources with a level of excitement and refinement that is unprecedented for an NAD Classic Series integrated amplifier.

Equipped with stereo RCA, optical, digital coax, and HDMI eARC inputs, you can connect practically any audio device to enjoy clear and accurate sound reproduction. For vinyl enthusiasts, the C 399 features a MM phono stage with ultra-precise RIAA equalization, extremely low noise, and high overload margins. In addition to the high-quality wired inputs, it comes with two-way Bluetooth built-in and dual MDC2 ports that provide expandability and future-proofing. The C 399 can serve as the hub of a world-class music system today, and for years to come.

HybridDigital Hypex nCORE Amplification
Trickled down from NAD’s Masters Series, the C 399’s HybridDigital nCore amplifier is highly efficient and remarkably powerful. It can deliver 180 watts per channel of continuous power, and 250 watts per channel of instantaneous power, allowing the C 399 to reproduce musical transients effortlessly. The HybridDigital nCore design is renowned for its wide bandwidth, flat frequency response, clean clipping behavior 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. These refinements enable the C 399 to produce neutral, distortion-free sound even at very high listening levels, with thrilling dynamics, exquisite detail, and superb portrayal of space.
High-Resolution ESS Sabre DAC
Also trickled down from the Masters Series is the ESS Sabre 9028 high-resolution DAC, a design noted for its wide dynamic range, ultralow noise and distortion, and near-zero levels of clock jitter. This premium DAC enables the C 399 to reproduce all your digital sources with amazing musicality, precise sound staging, and stunning clarity.
MDC2
MDC2 is the second generation of NAD Electronics’ innovative Modular Design Construction futureproofing technology. Introduced in 2006, MDC lets owners of NAD components add exciting new capabilities such as Dolby Atmos immersive audio, 4K video switching, and BluOS multiroom music streaming. Debuting on the NAD C 399, MDC2 features an all-new architecture that allows signals to be passed back and forth between the module and host component. This opens a far wider range of upgrade options for the C 399, and future MDC2-enabled components.
Smart Home Control
The C 399 comes equipped with IR remote, 12V trigger in and out, IR in and out, and an RS-232 serial port to allow seamless integration with smart home control systems such as Control4, Crestron, RTI, URC, Push, Lutron, iPort, and Elan.
Additional Features
  • Speaker A / Speaker B output
  • Two-way Qualcomm aptX HD Bluetooth
  • High-res audio to 24-bit / 192 kHz
  • Stereo RCA preamp output
  • Dual subwoofer outputs
  • Dedicated headphone amplifier
  • HDMI CEC
  • Sleep timer
  • Dimmable display
UPC: 786357002873

NAD Electronics C 399 Specs

Key Specs
Channels
2.2
Power Output per Channel
2-Channel Driven:
180 W at 8 Ohms / 20 Hz to 20 kHz / 0.02% THD (RMS)
180 W at 4 Ohms / 20 Hz to 20 kHz / 0.02% THD (RMS)
Rear A/V Outputs
1x Stereo RCA Pre-Out
2x RCA Subwoofer Line-Out
Speaker I/O
4x Binding Post Pairs
Wi-Fi
No
Bluetooth
Yes
Amplifier
Amplifier Type
Integrated Amplifier (Preamp/Power Amp Combo)
Channels
2.2
Amplifier Class
Class-D
Power Output per Channel
2-Channel Driven:
180 W at 8 Ohms / 20 Hz to 20 kHz / 0.02% THD (RMS)
180 W at 4 Ohms / 20 Hz to 20 kHz / 0.02% THD (RMS)
Dynamic Power per Channel
217 W at 8 Ohms
400 W at 4 Ohms
506 W at 2 Ohms
Frequency Response
20 Hz to 20 kHz ±0.3 dB
THD
< 0.02% (4 Ohms, 8 Ohms, Full Power)
Channel Separation
> 90 dB (1 kHz)
> 75 dB (10 kHz)
Speaker Impedance
2 to 8 Ohms
Damping Factor
> 150 (8 Ohms)
Audio Processing
Supported Sample Rates
Up to 192 kHz / 24-Bit
DAC
384 kHz / 32-Bit (ESS Sabre)
Connectivity
Rear A/V Inputs
1x HDMI
2x Optical TOSLINK
2x Digital Coaxial
1x Stereo RCA (Phono MM) with Ground Screw
2x Stereo RCA
Rear A/V Outputs
1x Stereo RCA Pre-Out
2x RCA Subwoofer Line-Out
Front I/O
1x 1/4" / 6.35 mm Headphone Output
Other Rear I/O
1x Bluetooth Coaxial F-Type Input
1x USB-A (Service) Input/Output
1x DE-9 (RS-232C) Input
1x 1/8" / 3.5 mm (IR) Input
1x 1/8" / 3.5 mm (IR) Output
1x 1/8" / 3.5 mm (12 V Trigger) Input
1x 1/8" / 3.5 mm (12 V Trigger) Output
Speaker I/O
4x Binding Post Pairs
HDCP Support
Yes
Audio Return Channel (ARC)
ARC, eARC
HDMI CEC
Yes
Media Card Slot
No
A/B Speaker Selection
Yes
Bi-Amp Capability
No
Input Impedance
Line: 56 Kilohms
Input Sensitivity
Line: 65 mV
Phono: 1.08 mV
Max Input Level
Line: > 4.6 Vrms
Phono: > 80 mVrms (1 kHz)
Signal to Noise Ratio
Line: > 106 dB (A-Weighted / IHF-A)
Phono: > 84 dB (A-Weighted)
Total Harmonic Distortion (THD)
Line to Speaker Out: < 0.02%
Headphone: < 0.005%
Phono: < 0.01%
Channel Separation
RCA to Speakers:
> 90 dB (1 kHz)
> 75 dB (10 kHz)
Wireless Connectivity
Wi-Fi
No
Bluetooth
Yes
Control
External Control Support
Control4, Crestron Command, ELAN, RTI, URC
Mobile App Compatible
Yes (Requires Separate Adapter): Android & iOS
Power
Input Power
100 to 240 VAC, 50 / 60 Hz
Physical
Dimensions (W x H x D)
17.1 x 4.7 x 15.4" / 435.0 x 120.0 x 390.0 mm
Weight
24.7 lb / 11.2 kg
Packaging Info
Package Weight
27.8 lb
Box Dimensions (LxWxH)
21.7 x 18.4 x 8.8"

NAD Electronics C 399 Reviews

Warm, powerful sound.  Great connectivity

By Chris
Rated 4 out of 5
Date: 2025-07-21

I've been a longstanding NAD owner dating back to the original 3020A integrated amp. Their reputation over time has always been punching way above their weight class. The C399 is no exception. Once received it was easy to setup and get connected to Roon. After that dialing in Dirac and other settings took minutes. I then threw my Equipment Demo playlist at it to hear if the sound was up to par. Overall, sound was warm and detailed with a big soundstage. Very happy with the unit.

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