NAD C328 Hybrid Digital Integrated Amplifier
Getting the Basics Right
NAD includes an MM Phono stage with precisely accurate RIAA equalization, high overload margins, extremely low noise, and an innovative circuit to suppress infrasonic noise that is present on all LPs – all without affecting bass response.
True High-End Quality
NAD's line inputs can accommodate all kinds of analog source components by offering ideal input impedance characteristics with linear ultra-low-noise buffer amplifiers to prevent any sonic degradation caused by inappropriate loading of the source device. They include a separate headphone amplifier with low output impedance and very high output voltage capability – enough to drive even high impedance studio monitor headphones. The low impedance line outputs can connect to a subwoofer to extend the versatility of this well thought out amplifier. These are all details you can hear.
Stream Music from Any Device
You can connect instantly to the C 328 with Bluetooth allowing you to stream music wirelessly from your smart device. Because of the high-performance digital circuitry included in the C 328, Bluetooth sounds much better than you remember.
Sophisticated Power
NAD has moved away from old-fashioned and power-hungry linear power supplies and Class AB output stages. Instead, they have developed circuits based on switch mode power supplies and Class D output stages. Once thought to be inferior to traditional topologies, NAD’s advanced work in this area has created some of the best performing amplifiers regardless of the basic design principle. These new designs are very linear over a wide bandwidth and provide consistent performance into all speaker loads, providing a dramatic advance over previous models. The power supply provides plenty of headroom able to provide, on-demand, over 100 watts of audio output when needed. It can operate with any AC mains voltage from 100V to 240V and provides pure DC power to all the various stages of the C 328. This highly efficient supply also provides near perfect regulation of voltage across a wide range of conditions and provides a solid noise-free foundation for the amplifying stages. The C 328 uses a customized version of the proven Hypex UcD output stage. This allows for massive power with nearly unmeasurable distortion and noise in the audible range. Every detail of this design has been carefully crafted and perfectly executed to wring out every last drop of performance.
ANALOG IN/HEADPHONE OUT
THD (20 Hz – 20 kHz) - <0.005 % at 1 V out
Signal-to-Noise Ratio - >100 dB (A-weighted, 32 ohms, ref. 2V out, unity gain)
Frequency response - ±0.3 dB (20 Hz - 20 kHz)
Output impedance - 11 ohms
ANALOG IN/SUBWOOFER OUT
THD (20 Hz – 20 kHz) - <0.005 % at 1 V out
Signal-to-Noise Ratio - >100 dB (A-weighted, 32 ohms, ref. 2V out, unity gain)
Frequency response - ±0.2 dB (20 Hz - 20 kHz)
Gain - 17 dB
Output impedance - 200 ohms
ANALOG IN/SPEAKER OUT
Continuous output power into 8 ohms and 4 ohms - 50W (ref. 20 Hz-20 kHz at rated THD, both channels driven)
THD (20 Hz – 20 kHz) - <0.03 % (100 mW to 40 W, 8 ohms and 4 ohms)
Signal-to-Noise Ratio - >95 dB (A-weighted, 500 mV input, ref. 1 W out 8 ohms)
Gain - 37 dB
Clipping power - >50 W (at 1 kHz 0.1 % THD)
IHF dynamic power -
- 2 ohm 210w
- 4 ohm 150w
- 8 ohm 80w
- Peak output current - >18A (in 1 ohm, 1 ms)
Damping factor - >100 (20 Hz - 20 kHz)
Frequency response - ±0.3 dB (20 Hz - 20 kHz)
Channel separation -
- >85 dB (1 kHz)
- >70 dB (10 kHz)
Input sensitivity (for 40 W in 8 ohms) - 250 mV
Standby power - <0.5 W
PHONO IN/SPEAKER OUT
THD (20 Hz – 20 kHz) - <0.03 % (200 mW to 40 W, 8 ohms and 4 ohms)
Signal-to-Noise Ratio - >75 dB with IHF MM cartridge (A-weighted, ref. 5mV input 1 kHz and 1W output in 8 ohms)
Frequency response (RIAA deviation) - ±0.3 dB (20 Hz - 20 kHz)
Note: The RIAA response is consistent with a pre-emphasis that is rolled off at 50kHz by a second order filter, such as used in Neumann cutting lathes.
Channel separation -
- >80 dB (1 kHz, 8 ohms, 50 mV input, 13W out)
- >60 dB (10 kHz, 8 ohms, 50 mV input, 13W out)
Input sensitivity (for 40 W in 8 ohms) - 3.6 mV
DIGITAL IN/SPEAKER OUT
THD (20 Hz – 20 kHz) - <0.03 % (100 mW to 40 W, 8 ohms and 4 ohms)
Signal-to-Noise Ratio - >95 dB (A-weighted, -12 dBFS input, ref. 1W out in 8 ohms)
Frequency response - ±0.3 dB (20 Hz - 20 kHz)
Gain - 47 dB (Vrms/FS)
Channel separation -
- >80 dB (1 kHz)
- >70 dB (10 kHz)
Gross dimensions (W x H x D) - 17 1/8 x 2 13/16 x 11 1/4 inches