Potato score: 93.3

93%

NAD M23 #1
NAD M23 variant 1

NAD M23

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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
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Overall Score 93/100

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Deliciously Crispy

NAD M23 — Masters-series stereo amplifier

The NAD M23 pairs Purifi Eigentakt Class D power with reference-class measurements to deliver a neutral, transparently detailed sound and extraordinary headroom. Tested by Gene DellaSala and reviewed extensively by Roger Kanno, the M23 consistently shows ultra-low distortion, a very low noise floor and a load-invariant frequency response that keeps imaging stable even at high output.

Sonically it emphasises clarity and control — tight, well-damped bass, clean mids and airy treble — while bench figures and listening reports confirm significant clean power (200Wpc stereo, high bridged capability) and excellent speaker grip. The brushed-alloy Masters styling, compact 21.4 lb chassis and thoughtful internal layout make it rack-friendly. Ideal for audiophiles who want a powerful, reveal­ing power amp for demanding floorstanders or high-resolution systems; note the reviewers' cautions about bridged use on low-impedance speakers. Overall the M23 is widely regarded as a high-value, performance-first amplifier.

SoundStage! Hi-Fi

"they seemed to perfectly amplify the incoming signal and send it—totally unadulterated—to the speakers."

Pros

  • Reference-level transparency and ultra-low distortion produce a neutral, highly resolving presentation.
  • Exceptional clean power and dynamics with strong speaker control and headroom even at high output.
  • High-quality build and Masters-series styling with compact, well-ventilated layout and useful ergonomics.
  • Outstanding value: performance comparable to much costlier amplifiers, making it a strong buy in its class.

&

Cons

  • Bridged mode can increase distortion/current draw and is not recommended for speakers that dip below ~5 Ω.
  • Ergonomic nitpicks: the capacitive top-panel power control can trigger accidentally and the magnetic foot coasters are fiddly.
  • Some listeners report a slightly lean or ‘analytical’ bass character on certain recordings and a brief warm-up period before full performance.

Sound Quality

94/100

Dynamics

95/100

Reviewers repeatedly praised the M23's authority, headroom and slam — phrases like 'sheer power, drive and projection', 'clean power with much in reserve', and 'drives large floorstanders' appear across reviews. Measured specs and reviewer commentary (IHF dynamic power >260W into 8Ω, 520W into 4Ω; peak current >25A; damping factor >800) back up its exceptional transient control and speaker grip. The Purifi/Eigentakt Class‑D topology plus reviewers' notes about low noise and load‑invariant response justify a top-tier dynamics score.

Soundstage Imaging

92/100

Multiple reviews highlighted precise imaging and expansive, coherent soundstages — instruments and vocals are placed distinctly front‑to‑back and side‑to‑side with convincing scale (SoundStage!, HiFi News, SoundStage Solo commentary). Listeners reported excellent delineation of microdetail and instrument placement even at high output, indicating the M23 preserves spatial cues under demanding playback.

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Build Quality

89/100

The M23 is compact, well‑finished (brushed alloy two‑tone case) and thoughtfully laid out internally; reviewers note solid construction though not 'ultra‑high‑end' heavy. The design uses switch‑mode power supplies and Purifi Class‑D output stages (Eigentakt), with bridge capability (>700W) and good thermal/venting design; overall a robust, high‑quality implementation for its class.

Value for Money

96/100

Across reviews the M23 is explicitly called an excellent value (terms used include 'a screaming bargain' and 'exceptional value') at its street price (reviewed at ≈$3,749 USD / UK pricing ~£3,399) while delivering ~200Wpc nominal (stereo), >260W dynamic into 8Ω and 520W into 4Ω, plus bridge >700W. Reviewers compare it favorably to much more expensive monoblocks (Anthem M1, Bryston 4B3) and say it 'compares very well' despite costing roughly half the price of those peers — strong, repeated positive value language supports a high value score.

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