NAD M23 V2
NAD stereo power amplifier with Purifi Eigentakt modules, delivering 700 W RMS into 8 ohms with very low distortion.
Description
The NAD M23 V2 is a stereo power amplifier designed for separates-based high-fidelity systems. It complements a preamplifier or streaming amplifier by providing the power stage, without source processing or built-in volume control.
The unit is built around Eigentakt Class D amplifier modules, developed by Purifi Audio and manufactured by NAD under licence. This design offers total harmonic and intermodulation distortion below 0.0013% (measured at 20 Hz and 20 kHz on RCA input), a signal-to-noise ratio above 127 dB into 8 ohms at 200 W, and a damping factor above 800, ensuring precise control over speaker movement. Peak output current exceeds 25 A into 1 ohm over 1 ms, reflecting the ability to meet transient current demands of difficult loads. Frequency response spans 20 Hz to 20 kHz into 8 ohms, and high-gain channel separation on RCA input exceeds 97 dB.
On output, the M23 V2 delivers 700 W RMS into 8 ohms per channel. It features auto-sensing unbalanced RCA and balanced XLR inputs, a three-position gain switch and a 12V trigger input, easing its integration into a remotely controlled separates system.
This power amplifier format is intended for users who already have a dedicated preamplifier or streaming source, and who want a power stage capable of driving current-hungry speakers in a high-end stereo system.
Technical specifications
| RMS power | 1 x 700 W (8 Ω) |
| Frequency response | 20 Hz - 20 kHz (8 Ω) |
| THD (20 Hz and 20 kHz) | < 0.0013% (RCA) |
| Signal to noise ratio | > 127 dB (200 W into 8 Ω) |
| Peak output current | > 25 A (into 1 Ω, 1 ms) |
| Damping factor | > 800 (ref. 8 Ω, 20 Hz to 6.5 kHz) |
| High gain RCA channel separation | > 97 dB |
| Dimensions (W x H x D) | 435 x 133 x 396 mm |
| Weight | 9.7 kg |
What to check before buying used
On a Class D power amplifier such as the M23 V2, the main checkpoints concern connectivity and power supply: verify that the auto-sensing RCA and XLR inputs switch correctly without hum or unexpected cut-outs, and that the three-position gain switch responds without any faulty contact. A load test (real speakers, moderate to high volume) helps ensure that the Eigentakt modules do not trigger premature thermal protection, a possible sign of clogged ventilation or ageing capacitors. The unit's weight (9.7 kg) and its power connectors also warrant a visual inspection to rule out any play or signs of overheating on the terminals.
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