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C 328 Hybrid Digital DAC Amplifier


Expansive Power with Unprecedented Flexibility

50W x 2 Continuous Power into 8 or 4 Ohms
Support for Bluetooth
MM Phono Input
Analogue Line Inputs
SPDIF Coax and Optical Inputs
Subwoofer Out
Headphone Amplifier
Bass EQ
IR Remote
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C 328 Hybrid Digital DAC Amplifier
Introducing the NAD C 328
The C 328 ties together all the critical elements of a top performing music system; music
sources past and present, while providing a deep reservoir of power that allows your
speakers to reveal every nuance of musical detail. This advanced amplifier includes many
cutting edge technological breakthroughs developed by NAD over a 45-year history of
creating affordable ultra-high performance audio components.
Getting the Basics Right
It is surprising how many seemingly advanced products in the market today often miss
the most basic requirements for satisfying performance. Low noise circuits, precise
volume control action, accurate channel balance, proper input and output impedance
characteristics, high overload margins and stability with difficult speaker loads. NAD
starts by getting these things precisely right and advances from there. We include 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
Our line inputs can accommodate all kinds of analogue 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. We
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 the old fashioned and power hungry
linear power supplies and Class AB output stages that waste
nearly half of the energy consumed producing heat rather than
sound. Instead we have developed even better performing
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.
Specifications C 328
All specs are measured according to IHF 202 CEA 490-AR-2008 standard. THD is measured using AP AUX 0025 passive filter and AES 17 active filter.
THD (20 Hz – 20 kHz) <0.005 {9944c9e6350763bd7a1910015c4fcedd460b38c4fcdc722a893e680e43966b1a} 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
THD (20 Hz – 20 kHz) <0.005 {9944c9e6350763bd7a1910015c4fcedd460b38c4fcdc722a893e680e43966b1a} 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
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 {9944c9e6350763bd7a1910015c4fcedd460b38c4fcdc722a893e680e43966b1a} (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 {9944c9e6350763bd7a1910015c4fcedd460b38c4fcdc722a893e680e43966b1a} 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
THD (20 Hz – 20 kHz) <0.03 {9944c9e6350763bd7a1910015c4fcedd460b38c4fcdc722a893e680e43966b1a} (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
THD (20 Hz – 20 kHz) <0.03 {9944c9e6350763bd7a1910015c4fcedd460b38c4fcdc722a893e680e43966b1a} (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) 435 x 70 x 285 mm, 17 1/8 x 2 13/16 x 11 1/4 inches
Net weight 4.9 kg (10.8 lbs)
Shipping weight 5.9 kg (13.0 lbs)