High-performance 2.2 channel integrated amplifier featuring Class-D amplification, ESS Sabre DAC, Bluetooth connectivity, and extensive input/output options.
The NAD Electronics C 399 is a HybridDigital DAC integrated amplifier designed for precise audio reproduction and versatile connectivity. It delivers 180 watts per channel into 8 or 4 ohms with less than 0.02% total harmonic distortion, supporting a frequency response of 20 Hz to 20 kHz ±0.3 dB. The amplifier utilizes Class-D technology and incorporates a 384 kHz/32-bit ESS Sabre DAC for high-resolution audio processing. Connectivity includes HDMI with ARC/eARC and CEC support, multiple digital inputs (optical, coaxial), analog inputs including phono MM, and Bluetooth for wireless streaming. Speaker outputs are provided via four pairs of binding posts, supporting impedances from 2 to 8 ohms. Additional features include A/B speaker selection, a 1/4" headphone output, and compatibility with external control systems such as Control4 and Crestron. The unit measures 17.1 x 4.7 x 15.4 inches and weighs 24.7 pounds.
2.2 channel integrated amplifier with Class-D amplification
180 W per channel at 8 or 4 ohms with <0.02% THD
ESS Sabre DAC supporting up to 384 kHz / 32-bit audio
Multiple inputs: HDMI (with ARC/eARC and CEC), optical, coaxial, phono MM, stereo RCA
Bluetooth wireless audio streaming capability
Four pairs of binding post speaker outputs supporting 2–8 ohm impedance
A/B speaker selection and 1/4" headphone output
Supports external control systems including Control4, Crestron, ELAN, RTI, and URC
Specifications
Bluetooth
Yes
Box Dimensions (LxWxH)
21.7 x 18.4 x 8.8"
Dimensions (W x H x D)
17.1 x 4.7 x 15.4" / 435.0 x 120.0 x 390.0 mm
HDCP Support
Yes
Input Impedance
Line: 56 Kilohms
Input Sensitivity
Line: 65 mV Phono: 1.08 mV
Mobile App Compatible
Yes (Requires Separate Adapter): Android & iOS
Package Weight
27.8 lb
Signal to Noise Ratio
Line: > 106 dB (A-Weighted / IHF-A) Phono: > 84 dB (A-Weighted)
THD
< 0.02% (4 Ohms, 8 Ohms, Full Power)
Total Harmonic Distortion (THD)
Line to Speaker Out: < 0.02% Headphone: < 0.005% Phono: < 0.01%
Wi-Fi
No
A/B Speaker Selection
Yes
Amplifier Class
Class-D
Amplifier Type
Integrated Amplifier (Preamp/Power Amp Combo)
Audio Return Channel (ARC)
ARC, eARC
Bi-Amp Capability
No
Channel Separation
RCA to Speakers: > 90 dB (1 kHz) > 75 dB (10 kHz)
DAC
384 kHz / 32-Bit (ESS Sabre)
Damping Factor
> 150 (8 Ohms)
Dynamic Power per Channel
217 W at 8 Ohms 400 W at 4 Ohms 506 W at 2 Ohms
External Control Support
Control4, Crestron Command, ELAN, RTI, URC
Front I/O
1x 1/4" / 6.35 mm Headphone Output
HDMI CEC
Yes
Max Input Level
Line: > 4.6 Vrms Phono: > 80 mVrms (1 kHz)
Media Card Slot
No
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
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
Speaker I/O
4x Binding Post Pairs
Speaker Impedance
2 to 8 Ohms
Supported Sample Rates
Up to 192 kHz / 24-Bit
Technical
Channels
2.2
Input Power
100 to 240 VAC, 50 / 60 Hz
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)
