When it comes to high-end integrated amplifiers, the NAD M33 and Hegel H390 are two of the most popular choices. Both offer audiophile-grade performance, but they have different strengths that cater to different users. In this comparison, we’ll break down their design, features, power output, connectivity, and sound quality to help you decide which one is the best fit for your system.
Overview of NAD M33 and Hegel H390
NAD M33: Next-Generation Class D Amplifier
The NAD M33 is a cutting-edge amplifier that features Purifi Eigentakt technology, a new class-D amplification method known for ultra-low distortion and high efficiency. It is a fully digital amplifier with a sleek design and built-in streaming capabilities.
Hegel H390: Powerful and Analog-Focused
The Hegel H390 is a class-AB amplifier that delivers high power and a rich, natural sound signature. Unlike the NAD M33, the H390 leans more towards traditional audiophile values, with a strong focus on pure, dynamic sound reproduction.
Design and Build Quality
NAD M33: Sleek and Modern
- The NAD M33 features a large touchscreen display, making it easy to control without external apps.
- Its aluminum chassis gives it a premium feel, while the minimalist design fits into modern setups.
- The overall look is clean, futuristic, and user-friendly.
Hegel H390: Traditional and Robust
- The Hegel H390 has a more classic hi-fi design with a simple black aluminum chassis.
- It lacks a touchscreen but has a large OLED display and physical control knobs.
- While not as visually striking as the NAD M33, it exudes a sense of power and durability.
Power and Performance
NAD M33: Class D Efficiency with High Power
- Rated Power Output: 200W per channel at 8Ω and 4Ω
- Amplification Type: Class D (Purifi Eigentakt)
- THD+N (Total Harmonic Distortion + Noise): Extremely low, around 0.00017%
The Purifi Eigentakt technology in the NAD M33 provides exceptional clarity, low noise, and low distortion, making it one of the cleanest-sounding amplifiers on the market.
Hegel H390: Analog Powerhouse
- Rated Power Output: 250W per channel at 8Ω, 490W at 4Ω
- Amplification Type: Class AB
- THD+N: Less than 0.005%
The Hegel H390 delivers more raw power compared to the NAD M33. It provides better dynamic range and is well-suited for power-hungry speakers.
Connectivity and Features
NAD M33: Feature-Rich and Fully Digital
The NAD M33 is built with modern audiophiles in mind, featuring:
✅ BluOS Streaming Platform for high-resolution multi-room streaming
✅ Built-in Dirac Live Room Correction for optimized sound in any environment
✅ ESS Sabre DAC for high-end digital conversion
✅ MQA and Roon Ready support
✅ AirPlay 2, Chromecast, and Bluetooth aptX HD
✅ Multiple HDMI, USB, and digital inputs
The M33 is a fully integrated digital amplifier, making it perfect for those who stream music from online sources.
Hegel H390: Simplicity and Analog Purity
The Hegel H390 offers:
✅ UPnP and AirPlay 2 support
✅ Hegel’s proprietary SoundEngine2 technology to eliminate distortion
✅ High-quality DAC that supports up to DSD256
✅ Balanced (XLR) and unbalanced (RCA) analog inputs
✅ Ethernet streaming (Spotify Connect, TIDAL Connect)
While it lacks Dirac Live and BluOS, the Hegel H390 focuses on pure sound quality rather than extensive features.
Sound Quality Comparison
NAD M33: Clean, Transparent, and Digital Precision
- The M33 produces an exceptionally neutral and transparent sound.
- Highs are crisp and detailed, mids are clear and well-balanced, and bass is tight but not overpowering.
- Dirac Live Room Correction significantly improves sound in untreated rooms.
- Best suited for listeners who prefer a clean, detailed, and modern sound signature.
Hegel H390: Warm, Dynamic, and Engaging
- The H390 delivers a fuller and more dynamic sound compared to the M33.
- Vocals and instruments have a richer, more organic texture.
- Bass is deep and punchy, making it ideal for large speakers and high-volume listening.
- Best for audiophiles who prefer an analog, lifelike presentation.
Which One Should You Choose?
| Feature | NAD M33 | Hegel H390 |
|---|---|---|
| Power Output | 200W per channel | 250W per channel |
| Amplification | Class D (Purifi Eigentakt) | Class AB |
| Sound Signature | Clean, neutral, and detailed | Warm, dynamic, and full-bodied |
| Streaming Support | BluOS, AirPlay 2, Chromecast | AirPlay 2, UPnP, Spotify Connect |
| Room Correction | Dirac Live | No |
| DAC Quality | ESS Sabre | Hegel proprietary DAC |
| Best For | Digital music lovers, modern audiophiles | Traditional audiophiles, power-hungry speakers |
Choose NAD M33 If:
✅ You want modern streaming features like BluOS and Dirac Live.
✅ You prefer a clean, neutral sound with ultra-low distortion.
✅ You listen to high-resolution digital music and use multi-room audio.
Choose Hegel H390 If:
✅ You want pure, high-power analog performance.
✅ You prefer a warm, dynamic sound with strong bass.
✅ You have power-hungry speakers and need more wattage.
Final Verdict: Which One Wins?
Both the NAD M33 and Hegel H390 are outstanding amplifiers, but they cater to different types of listeners:
- The NAD M33 is the better choice for those who prioritize modern features, digital precision, and streaming capabilities.
- The Hegel H390 is ideal for audiophiles who value power, warmth, and an analog-style listening experience.
Ultimately, your decision should depend on your listening preferences, speaker requirements, and system setup.
