High-End Home-Theater Performance Made Easy: NAD Masters Series M28 Seven-Channel Power Amplifier Supplies 320Wpc of Dynamic Power, Takes Hold of Speakers with Authority
The fully balanced NAD Masters Series M28 hybrid digital multichannel amplifier makes immersive, lifelike, seven-channel surround-sound seem like the simplest of tasks. Rated at 200Wpc continuous into eight ohms, M28 in reality provides more than 320 watts of dynamic power per channel with all channels driven. Fueled by Purifi Eigentakt technology, M28 features seven pairs of balanced XLR as well as seven pairs of single-ended inputs, a control loop, and off-the-charts power reserves. One listen and you'll relish the clarity, openness, dynamics, and musicality mustered by a design that takes hold of practically any speakers with distortion-free control and gripping authority. Multichannel power amplifiers don't play any cleaner than the cool-running M28. A perfect match with NAD's M17 V2i pre/pro and a formidable component on its own, this is the sound of the present and future. 100% Music Direct Satisfaction Guaranteed.
Purifi Eigentakt Hybrid Digital Amplification
Masters Series M28 uses Eigentakt amplifier technology, manufactured by NAD in license from Purifi. This new technology, which NAD was the first to embrace for the M33 Masters Series streaming amplifier, adds another level of precision by taking into account previously unknown effects of the output filter in the feedback loop and further refinement of the self-oscillating Class D technology as used by previous NAD Hybrid Digital designs. The result is a performance level that approaches the theoretical limit in measured performance, be it at whispering levels or at full power. In common with the previous generations of NAD Hybrid Digital technology but unlike most class D amplifier designs, M28 is impervious to the loudspeaker load it is presented with, maintaining the same wide and even bandwidth response irrespective of the speaker's impedance and at the same time providing high current capability. The continuous 200W into 8 ohms on tap for all channels driven at the same time and 700W dynamic power into 4 ohms is testament to this. Inherent to the Eigentakt technology is its very analog-like behavior in the unlikely event the amplifier is driven into clipping. Whereas many Class D designs can become unstable, Eigentakt behaves in a way similar to the benign way of clipping with instant recovery of well executed traditional Class A/B amplifiers. The sonic character of M28 only reinforces the story told by the numbers. This is an amazingly powerful and transparent amplifier bringing new levels of refinement and dynamics at any level.
Fully Balanced Audio
The same efficient audio interface used by studios provides the highest level of signal integrity with the lowest noise floor. Locking connectors and special interface electronics allow long cable runs without noise pickup or signal loss. All you get is awesome sound without the possibility of noise pickup or interference.
NAD's most powerful amplifier, M28 can pump out over 700W into difficult loads to follow complex dynamic peaks in your movies and music. Everything from rim shots to asteroid explosions sound remarkably real and immersive. M28 has power reserves to meet the demands of the latest high-resolution digital soundtracks. Thanks to the advanced Purifi Eigentakt amplifier technology, all this monster power comes at a lot less cost than traditional technology and delivers more power and performance.
≥ 220 W (ref. rated THD, 8 Ohms , 20 Hz – 20 kHz, two channels driven)
≥ 400 W (ref. rated THD, 4 Ohms , 20 Hz – 20 kHz, two channels driven)
Rated power, all channels:
≥ 200 W (ref. rated THD, 8 Ohms , 20 Hz – 20 kHz, all channels driven)
≥ 340 W (ref. rated THD, 4 Ohms , 20 Hz – 20 kHz, all channels driven)
Rated THD (250 mW to rated power, CCIF IMD, DIM 100): ≤0.003 % (ref. 20 Hz – 20 kHz)
IHF dynamic power:
280 W 8 Ohms, (all channels driven)
560 W 4 Ohms, (one channel driven)
Damping factor: 1.3 V (ref. rated power)
Input impedance: 47 kΩ (Balanced)
Input Impedance (r and c):
23 kΩ (Single-ended)
>118dB (ref. rated power)
Damping Factor: >750dB (ref. 8 Ohms, 50Hz and 1kHz)
±0.1dB (ref. 20Hz-20kHz)
-2.5dB at 3Hz and 100kHz
Input Impedance: 47 kilohm (Balanced)
> 102dB (A-weighted ref. 1W, Balanced)
> 97 dB (A-weighted ref. 1W, Single-ended)
> 124 dB (A-weighted ref. rated power, Balanced)
> 120 dB (A-weighted ref. rated power, Single-ended)
± 0.1 dB (ref. 20 Hz – 20 kHz)
– 3 dB at 3 Hz to 60 kHz
Time to go to Standby mode at no input signal: ≤ 30 minutes
Standby power: ≤ 0.5W
Dimensions (WHD): 17 3/16" x 6 3/16" x 15"
Shipping Weight: 46.7 lbs
Warranty: 3 years
User Manual (PDF, 1.6 MB)