NAD M23 Masters Stereo Power Amplifier

M23 Stereo Power Amplifier

Building on NAD’s long tradition of identifying and
developing cutting-edge amplification technology, the M23 HybridDigital Stereo
Power Amplifier features Purifi Audio’s Eigentakt™ design, a once-in-a-decade
innovation that virtually eliminates harmonic and intermodulation distortion.
Noise is inaudible, for a completely black background and exquisite
micro-detail. Conservatively rated at 2x200W continuous into 8 ohms and 2x380W
into 4 ohms, the M23 can deliver live performance levels through any
loudspeaker. With its unique combination of features, performance, and value,
the M23 represents the new benchmark for the stereo power amplifier.

NAD Masters M23 Stereo Power Amplifier

Pure Power

The M23 employs Eigentakt™ class-D amplifier modules
manufactured by NAD under license from Denmark’s Purifi Audio. Purifi’s
load-invariant design provides wide, flat frequency response, even into
challenging loudspeaker loads. Noise, harmonic distortion, and IM distortion
are virtually unmeasurable at all frequencies and output levels. Another
benefit of the Eigentakt™ design is extremely low output impedance and
correspondingly high damping factor, for iron-clad control of the loudspeaker
output. NAD combines the Eigentakt™ design with our own sophisticated
switched-mode power supply, which can provide additional reserves of current
when needed. Amazingly powerful and transparent, the M23 can deliver 2x260W of
peak power into 8 ohms and 2x520W into 4 ohms.

Uncompromised Performance

The ideal amplifier will achieve vanishingly low distortion,
ultra-high damping factor, and rock-solid stability with any loudspeaker loud.
There are many amplifiers that perform well in one or two of these areas, but
fall short in others. Thanks to Purifi’s highly efficient Eigentakt™ design and
NAD’s proven switch-mode power supplies, the M23 excels in all three areas –
without the excess weight and cost of the old-fashioned linear power supplies
and class-AB output stages used with traditional amplifiers. Eigentakt™
outperforms previous class-D implementations by a significant margin,
delivering transparent, detailed sound with expansive soundstaging and
holographic imaging, at all listening levels and with all types of program
material – even during complex musical passages.

Flexible and Powerful

Equipped with single-ended RCA and balanced XLR auto-sensing
inputs, three-position gain-control switch, and 12V trigger input, the NAD
Masters M23 HybridDgital Stereo Power Amplifier can easily be integrated into a
high-performance separates system. Two M23 amplifiers operating in bridged mode
can be paired together, each delivering 700W of continuous power into 8 ohms.
The M23 amplifier can also be paired with NAD’s award-winning Masters M33 BluOS
Streaming Amplifier. With the two Eigentakt™ amplifiers operating in bridged
mode, the M33/M23 combination will deliver a staggeringly powerful 700Wpc
continuous output.

Elegant and Practical

With its elegant all-alloy casework, the Masters M23
HybridDigital Stereo Power Amplifier is as pleasing to the eye as it is
thrilling to the ears. The M23 has the same quality of construction for which
NAD’s Masters Series is renowned. Rigid panels and magnetic iso-point feet
provide a rock-solid foundation for the M23’s multi-layer circuit boards and
intricate internal construction. Truly the M23 represents a new pinnacle in
power amplifier design.

Features & Details

• HybridDigital
  Purifi Eigentakt™ amplifier technology

• Continuous
  Power Output: 2x200W into 8 ohms; 2x380W into 4 ohms

• Dynamic
  Power Output: 2x260W into 8 ohms; 2x520W into 4 ohms

• Bridged
  Power Output: 700W mono continuous into 8 ohms

• In
  bridged mode, can be combined with the NAD M33 BluOS Streaming Amplifier
  to create a 2x700W system

• Virtually
  unmeasurable noise, harmonic distortion, intermodulation distortion

• Wide,
  flat frequency response into any loudspeaker load

• Balanced
  (XLR) and single-ended (RCA) auto-sensing inputs

• Three-position
  adjustable gain control

• 12V
  trigger input

ANALOG AUDIO INPUT/SPEAKER OUT

• Input
  impedance (R and C)

• Single-ended:
  56 kohms + 200 pF Balanced: 56 kohms +200 pF

• Frequency
  response (1W into 8 Ohms)

• ±0.06dB
  (20-20kHz)

• Rated
  output power into 8 Ohms and 4 ohms(Stereo mode) 80 W (ref. 20 Hz-20
  kHz at rated THD, both channels driven)

• >200W
  into 8 Ohm, >380W into 4 Ohm

• Rated
  output power into 8 Ohms (Bridge mode, ref. 20 Hz-20 kHz at
  rated THD, both channels driven)

• >700W
  into 8 Ohm

• THD
  (20 Hz – 20 kHz)

• <0.00069%
  (XLR), <0.0013% (RCA)

• Signal-to-Noise
  Ratio

• >101.7
  dB (1W into 8 Ohm)

• >127
  dB (200W into 8 Ohm)

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

• >210
  W (0.1 % THD 1 kHz 8 ohms)

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

• >
  770W

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

• 8
  ohms: 260 W

• 4
  ohms: 520 W

• IHF
  dynamic power (Bridge mode, at 1 kHz)

• 1017W

• Peak
  output current

• >25
  A (in 1 ohm, 1 ms)

• Damping
  factor

• >800
  (ref. 8 ohms, 20 Hz to 6.5 kHz)

• Frequency
  response

• ±0.06
  dB (stereo), ±0.054 dB (bridged) 20 Hz -20 kHz -3 dB at 60 kHz

• Channel
  separation

• High
  gain RCA: >97dB, Low gain XLR: >115dB (1kHz)

• High
  gain RCA: >75dB, Low gain XLR: >96dB (10kHz)

• Stereo
  Mode input sensitivity (for 200 W in 8 ohms)

• Low
  gain: 4.5V (low gain), 2.5V (Mid gain), 1.4V (High gain)

• Stereo
  Mode Gain

• 19dB
  (low), 23.9dB (mid), 29.2 (high)

• Bridge
  Mode Gain

• 25.1dB
  (low), 30dB (mid), 35.2 (high)

• Standby
  Power

• <0.5W

DIMENSIONS AND WEIGHT

• Gross
  dimensions (W x H x D)

• <0.5W

• Net
  Weight

• 9.7
  kgs / 21.4 lbs

• Shipping
  Weight

• 17.5 kgs / 38.5 lbs