The NAD C 399 HybridDigital DAC Amplifier is a high-performance integrated amplifier delivering 180W-per-channel power with HybridDigital nCore technology for clean, controlled sound. Its refined digital architecture supports up to 24-bit/192 kHz playback and pairs with versatile connectivity including HDMI eARC, multiple digital/analogue inputs, and Bluetooth aptX HD. Vinyl lovers get an ultra-low-noise MM phono stage, while system builders benefit from dual subwoofer outputs, dual speaker terminals, and a dedicated headphone amplifier. With two MDC2 expansion slots, the C 399 is built to evolve—especially with the optional MDC2 BluOS-D module for BluOS streaming and Dirac Live Limited Bandwidth.
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NAD C 399 HybridDigital DAC Integrated Amplifier

The NAD C 399 HybridDigital DAC Amplifier is a powerhouse integrated amplifier built to anchor a serious hi-fi or TV-centered system with effortless control, low noise, and future-ready flexibility. Using NAD’s HybridDigital nCore amplification, it delivers clean, stable power that stays composed with demanding speakers, while its refined digital section pulls out detail, imaging, and dynamic nuance from modern sources. For system growth, two MDC2 expansion slots let you add new capabilities over time—most notably the optional MDC2 BluOS-D module for BluOS multi-room high-resolution streaming and Dirac Live Room Correction (Limited Bandwidth) that can be applied across connected sources. With HDMI eARC, a precision MM phono stage, multiple digital and analogue inputs, dual subwoofer outputs, and Bluetooth with aptX HD, the C 399 is designed to be the “do-it-all” integrated amp that makes every source sound more alive and controlled.

The NAD C 399 is part of ListenUp's NAD Integrated Amplifiers Collection.

What It's Good At:

• Driving demanding speakers with confident, high-current 180W-per-channel performance
• Delivering clear, low-noise detail from digital sources with a refined DAC architecture
• Future-proofing your system via dual MDC2 expansion slots for upgrades over time
• Upgrading to premium streaming and room correction with the optional MDC2 BluOS-D (BluOS + Dirac Live Limited Bandwidth)
• Seamless TV integration through HDMI eARC with strong, articulate sound
• Flexible system building with dual sub outs, dual speaker terminals, phono, and quality headphone amplification

NAD C 399 Full Specifications:

• Amplification
  • 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 power: 210W (at 1 kHz 0.1% THD)
  • IHF dynamic power: 8 ohms: 217 W
  • Peak output current: >26 A (in 1 ohm, 1 ms)
  • Damping factor: >150 (ref. 8 ohms, 20 Hz to 6.5 kHz)
  • Frequency response: ±0.3 dB (20 Hz – 20 kHz)
  • Channel separation: >90 dB (1 kHz)
  • Input sensitivity (for 180 W in 8 ohms): Line In: 201 mV
• Preamplifier
  • THD (20 Hz–20 kHz): <0.002% at 2 V out
  • Signal/Noise Ratio: >106 dB (IHF; A-weighted, ref. 500 mV out, unity gain)
  • Channel separation: >100 dB (1 kHz); >90 dB (10 kHz)
  • Input impedance (R and C): 56 kohms + 100 pF
  • Maximum input signal: >4.6 Vrms (ref. 0.1% THD)
  • Output impedance: Source Z + 320 ohms
  • Input sensitivity: 65 mV (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
  • THD (20 Hz–20 kHz): <0.01% at 2 V out
  • Signal to Noise Ratio: >84 dB (200 ohms source; A-weighted, ref. 500 mV out)
  • Input impedance (R and C): 46 kohms / 100 pF
  • Input sensitivity: 1.08 mV (ref. 500 mV out, Volume maximum)
  • Frequency response*: ±0.3 dB (20 Hz – 20 kHz)
  • Maximum input signal at 1 kHz: >80 mVrms (ref. 0.1% THD)
• Headphone
  • THD (20 Hz–20 kHz): <0.005% at 1 V out
  • Signal/Noise Ratio: >107 dB (32 ohms loads; A-WTD, ref. 1 V out, unity gain)
  • Frequency response: ±0.3 dB (20 Hz – 20 kHz)
  • Channel separation: >62 dB at 1 kHz
  • Output impedance: 2.2 Ohms
• General Specifications
  • Supports bit rate/sample rate: up to 24 bit / 192 kHz
  • Frequency band: 2.402G – 2.480G
  • Maximum transmit power (dBm): 7 dBm ± 2 dBm
• Weight & Dimensions
  • Gross dimensions (W x H x D)**: 435 x 120 x 390 mm
  • Net weight: 11.2 kg (24.7 lb)
  • Shipping weight: 13.6 kg (30 lb)

NAD C 399 Q&A:

How much power does the NAD C 399 deliver per channel?

It delivers over 180 watts per channel using NAD’s HybridDigital nCore amplifier platform for clean, stable performance.

Can I connect my TV directly to this amplifier?

Yes—HDMI eARC is included for easy TV audio integration and improved sound compared to built-in TV speakers.

Does the C 399 support high-resolution audio playback?

Yes—it supports up to 24-bit/192 kHz for compatible digital sources.

Is this a good choice for vinyl turntables?

Yes—the C 399 includes an ultra-low-noise MM phono stage designed for clean, detailed playback from moving-magnet cartridges.

Can I stream music wirelessly from my phone?

Yes—built-in Bluetooth with aptX HD enables higher-quality wireless listening from compatible devices.

What are MDC2 expansion slots used for?

Two MDC2 slots allow the amplifier to be upgraded with future modules, helping keep your system current as technologies evolve.

What does the optional MDC2 BluOS-D module add?

It can add BluOS high-resolution streaming and Dirac Live Room Correction (Limited Bandwidth) through the BluOS Controller app.

Can I run subwoofers and multiple speaker pairs?

Yes—the C 399 includes dual subwoofer outputs and two sets of speaker terminals for flexible system configurations.

NAD C 399 Downloads:

NAD C399 Manual
NAD C399 Quick Start Guide
NAD C399 Data Sheet