NAD M22 V2 Masters Stereo Power Amplifier

Description

Connect to the emotion of live performance through detailed
sound with amazing control and transparency. This is the M22 V2. It is easy to
find amplifiers that can excel in one or two areas, but the M22 is truly an
amplifier that does everything well. Wide open-loop bandwidth, extremely
low-phase shift, almost non-existent noise, harmonic and intermodulation
distortion independent of load (load invariant), high current capability, low
output impedance (high damping factor) uniformly at all audible frequencies—it
all adds up to incredible performance. You just have to hear it to feel it.

Hybrid Digital Amplification

The M22 is using the latest nCore^™ amplifier
technology licensed from Hypex to provide a nearly ideal amplifier with
distortion below measurement, ultra-high damping factor, and unconditional
stability with any speaker. Tight, detailed sound with amazing control and
transparency gets the best performance available. With nCore, Hypex has refined
their UcD concept to new levels of perfection by improving the modulator for
more accurate feedback subtraction and PWM generation. The all-discrete driver
and output stage have also been improved for lower open-loop THD as well as
lower idling losses, normally conflicting requirements with conventional IC
driver circuitry. An added control loop incorporating an integrator with
adaptive clipping enables 20dB more feedback to be used across the audio band
because of its extremely low-phase shift resulting in a dramatic reduction in
distortion across the audio band. This is added to UcD’s already amazing
characteristics of load invariance and high current capability, common
characteristics of great-sounding amplifiers.

Effortless Power

Employing the latest generation of digital PowerDrive™, the
M22 offers a minimum of 300W per channel with amazing reserves of dynamic power
at lower impedances. The M22 is capable of >400W dynamic power per channel
even in 8 ohms, >700W in 4 Ohms, and 1,000W in 2 ohms. Need more power?
Select Bridge Mode and the M22 offers 950W at 8 Ohms in Mono. It can
effortlessly power any loudspeaker to live performance levels with amazing
efficiency and low power consumption. Control for PowerDrive is derived by
sensing the average output power, applying a time constant, and then cleanly
hard clipping the signal thus limiting it to the rated continuous clipping
power over a sustained loading. By controlling the power envelope maximum clean
power is obtained for every operating condition.

Perfecting Performance

The output stage is only one of several circuits in the
amplifier, and each must complement the other to obtain optimal performance.
The amp is DC coupled throughout, from input to output, there is no capacitor
in the forward signal path. Yet, it has a beneficial 12dB/octave roll-off below
2Hz. It does this using a unique circuit topology that is functionally a
forward servo. It is however not a servo in the traditional sense as it does
not measure DC at the output and send back a correction signal. Instead part of
the input signal is fed to a side chain with a second order low-pass filter.
The output of this is subtracted from the forward signal input to the second
stage thus rejecting DC.

Clean and Dynamic

The performance of the entire signal path is critically
dependent on the power supply; in this case a well regulated, but not too
tight, custom switch mode design. This allows maximum dynamic power, very high
current yet with very low distortion. Secondary supplies are individually regulated
and decoupled at each opamp for lowest possible noise and maximum dynamic
range.

Audio Specifications

• Continuous
  output power into 8 ohms and 4 ohms (Stereo mode)

• 300 W
  (20 Hz-20 kHz at 0.1% THD, both channels driven)

• Continuous
  output power into 8 ohms (Bridge mode) THD+N (20 Hz – 20 kHz, CCIF IMD,
  SMPTE IMD, DIM 100)

• 900 W
  (20 Hz – 20 kHz at 0.1% THD)

• THD+N
  (20 Hz – 20 kHz, CCIF IMD, SMPTE IMD, DIM 100)

• <0.005
  % (250 mW to 290W, 8 ohms and 4 ohms)

• Note: Measured
  with Audio Precision AUX-0025 or Prism dS-LPF passive low pass filter

• Signal-to-Noise
  Ratio

• >100
  dB (A-weighted, ref. 1 W in 8 ohms

• >120
  dB (A-weighted, ref. 300W in 8 ohms)

• Clipping
  power (Stereo mode, at 1 kHz 8 ohms 0.1 % THD)

• >300
  W

• Clipping
  power (Bridge mode, at 1 kHz 8 ohms 0.1 % THD)

• >950
  W

• IHF
  dynamic power (Stereo mode, at 1 kHz 1 % THD)

• 8
  ohms: 400 W

• 4
  ohms: 700 W

• 2
  ohms: 1000 W

• Damping
  factor

• >800
  (ref. 8 ohms)

• Frequency
  response

• ±0.1
  dB (20 Hz – 20 kHz)

• Input
  sensitivity (for 300W in 8 ohms)

• 1.73 V

• Gain
  level

• Low:
  19 dB

• Medium:
  24 dB

• High:
  29 dB

• Minimum
  input level for Auto Trigger

• 5 mV
  at 1 kHz

• Standby
  power

• <0.5
  W

Dimension and weight

• Gross
  dimensions (W x H x D)

• 435 x
  103 x 379 mm

• 17 1/8
  x 4 1/16 x 14 15/16 inches

• Net
  Weight

• 8.9 kg
  (19.6 lbs)

• Shipping
  Weight

• 15 kg (33.1 lbs)