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.
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
