NAD M33 BluOS Streaming B-Stock full amplifier

BluOS™ Streaming Integrated Amplifier HybridDigital™ Purifi Eigentakt™ Amplifier

Over NAD's nearly 50-year history, numerous innovative amplifier technologies have been developed, from the classic 3020 to the Class D flagship M2. The NAD M33 is the world's first high-end streaming integrated amplifier to utilize the innovative Purifi Eigentakt™ technology and promptly won the EISA Award for Best "Smart Amplifier 2020/21."

Purifi, a Danish technology company, is committed to eliminating the remaining weaknesses in digital amplifier technology. The result of this work is the Purifi Eigentakt™ amplifier, which NAD is the first company to manufacture under license.

Purifi Eigentakt™ technology is characterized by extremely low intermodulation distortion, a particularly low THD of just 0.005% across the entire frequency response, and minimal inherent noise. A key element of the development was the reduction of hysteresis effects, which lead to sonic degradation in conventional digital amplifiers. Through modifications to the output stage and clever algorithms, Purifi was able to significantly reduce these effects. The Eigentakt™ power amplifiers are also insensitive to changing speaker loads and, thanks to their extremely low output impedance, offer clean and controlled bass reproduction.

BluOS™ high-resolution music streaming

NAD relies on BluOS™ as its most advanced network streaming and multi-room system, capable of streaming high-resolution audio data in multiple rooms. BluOS™ supports the new MQA compression standard and enables playback of studio master recordings in 24-bit/192 kHz format. More than 20 music services such as Tidal, Deezer, Qobuz, Amazon HD, and Spotify can be accessed via BluOS™, as can locally stored music libraries. The M33 can also be integrated into many smart home systems via BluOS™.

The M33 can be operated via the TFT touch panel, the BluOS™ app for Android and iOS devices, Windows and Mac computers, the included remote control or via Siri voice control.

Dirac Live® Room Correction

Room acoustics have a significant impact on the playback quality of a hi-fi system. The NAD M33 therefore utilizes Dirac Live® Room Correction, which tunes the audio system to the room acoustics and also analyzes the transient response of the audio signals. The included measurement microphone enables precise calibration, resulting in a more balanced, natural, and spatial sound reproduction. Dirac Live offers five storable profiles for adapting the sound to different acoustic conditions. The M33's two subwoofer outputs are compatible with Dirac's unique "Bass Management" feature.

MDC – future-proof modular design

The M33 is already equipped with BluOS™, HDMI, Bluetooth®, and Dirac Live® in its standard version and can be further expanded via two slots for MDC modules. This allows for the integration of future technologies and audio formats, such as the MDC HDM-2 HDMI module.

Apple AirPlay 2

The M33 can be integrated into an Apple network via AirPlay 2 and can be used as a playback device for music streams from Mac, iPhone, or iPad. Siri voice control allows you to directly start music tracks and radio stations.

Numerous connections and Bluetooth®

The M33 offers six digital and three analog inputs, including an MM/MC phono input. HDMI, USB, and LAN ports are also available. The parallel speaker outputs allow for two pairs of speakers or one pair to be connected conventionally or via bi-wiring. The subwoofer outputs are digitally configurable. Wireless streaming from a smartphone or tablet is possible via Apple Airplay 2 and the integrated Bluetooth® aptX™ HD module.

Phono and headphone connections

A high-quality phono preamplifier, switchable for MM and MC systems, ensures optimal sound quality. The discrete headphone amplifier can also drive planar magnetic and high-impedance studio headphones, while wireless headphones can be controlled via the Bluetooth® aptX™ HD module.

Extensive smart home integration

The M33 fully integrates with numerous smart home systems and can be controlled via BluOS™ apps for iOS and Android, as well as desktop controls for Windows and macOS. This integration enables seamless control along with lighting, shading, HVAC, and security systems.

High-quality aluminum housing

The M33's housing is constructed entirely of aluminum, providing both elegant design and high stability. Torsion-resistant panels with magnetic iso-point feet provide an optimal foundation for the complex internal structure. The M33 represents a modern take on the traditional stereo amplifier, with cutting-edge features and ample power reserves.

Main features of the M33 BluOS Streaming Amplifier

• BluOS™ Streaming Integrated Amplifier
• HybridDigital™ Purifi Eigentakt™ Amplifier
• Continuous power: 2 x 200 W at 8 O and 4 O
• Pulse power: 300 W at 8 O, 550 W at 4 O
• 32-bit/384 kHz ESS Sabre D/A converter
• 1GHz ARM® CORTEX A9 processor
• Dirac Live® Room Correction
• Touchscreen with color TFT display
• AirPlay 2
• BluOS™ voice control via Siri and Amazon Alexa
• Bidirectional Qualcomm Bluetooth® aptX™ HD
• BluOS™ multi-room playback
• Roon Ready Certification
• Gigabit Ethernet
• Dual-band Wi-Fi 5 a/c/n
• HDMI eARC
• USB Type A input
• 2 analog high-level inputs
• AES/EBU XLR input
• All digital inputs designed for 24 bit/192 kHz
• 2 optical digital inputs
• 2 coaxial digital inputs
• Balanced XLR high-level input
• Preamplifier output
• 2 independent subwoofer outputs with adjustable crossover frequency
• High-current headphone amplifier
• 2 MDC slots for expansion
• IR input
• 12 V trigger input and output
• Apps for iOS, Android, Mac OS, Windows, Crestron, Control4, RTI, URC, Elan, Lutron, iPort, KNX
• In-app support for numerous streaming services such as Amazon Music HD, Spotify, Tidal, Qobuz, TuneIn, Napster, Deezer and more

Technical specifications of the M33 BluOS Streaming Amplifier

Continuous output power:

• 2 x 200 W at 8 O and 4 O (20 Hz – 20 kHz at specified THD, both channels driven)

THD (20 Hz – 20 kHz):

• <0.003% (1 W to 200 W, 8 O and 4 O)

Signal-to-noise ratio:

98 dB (A-weighted, 500 mV input, 1 W output at 8 O)

Clipping performance:

210 W (at 1 kHz, 0.1% THD)

Pulse power:

• on 8 O: >200 W
• on 4 O: >380 W

Output power in bridge circuit at 8 O:

700 W (at 20 Hz – 20 kHz and nominal harmonic distortion)

Damping factor:

800 (8 O, 20 Hz – 6.5 kHz)

Frequency response:

• ±0.2 dB (20 Hz – 20 kHz)
• -3 dB at 60 kHz

Power consumption with Auto Standby ON:

• <0.5 W

Power consumption when idle:

• <40 W

Preamplifier

Input impedance (R and C):

• 47 kOhm / 180 pF

Maximum input level:

2 Vrms / 8 Vrms (at 1 kHz)

Output impedance:

• 100 O

Input sensitivity:

• 280 mV (at 500 mV output level, volume at maximum)

Maximum output level:

4 Vrms (0.1% THD)

Tone controls:

• Treble: ±6 dB at 10 kHz
• Bass: ±6 dB at 100 Hz

Phono input sensitivity:

• MM: 1.2 mV
• MC: 100 µV

Input impedance (R and C) Phono:

• MM: 56 kO / 100 pF
• MC: 100 Ω / 280 pF

Headphone output impedance:

• 2.2 O

Dimensions and weight

Dimensions:

• 435 x 133 x 396 mm

Weight:

• 9.7 kg

Carton weight:

• 18.4 kg