NAD M33 Master Series BluOS Streaming Amplifier

Recommended Component 2024 – Stereophile

Product of the Year 2020 – Stereophile

Integrated Amplifier of the Year 2020 – Stereophile

Editor's Choice 2020 – Stereophile

Advanced Features, Cutting-Edge Technology, and High Power

NAD's Masters M33 BluOS™ enabled DAC/amplifier is an ultra-high-performance streaming amplifier with superb audiophile sound. As a BluOS enabled component, the M33 can be combined with other players in a BluOS ecosystem of wirelessly networked music players throughout the home for an outstanding whole-home audio system.

Employing the new Purifi Eigentakt™ Hybrid Digital amplifier technology, the M33 follows NAD’s long-standing tradition in identifying and developing cutting-edge amplification technology. With a minimum of 200W per channel on tap, the result is lifelike performance, exemplified by ultra-low distortion and noise.

BluOS tightly integrates hardware and software for an exceptional user experience. The only true wireless High-Resolution multi-room system available today, BluOS supports the new standard for High Res streaming, Master Quality Authenticated (MQA). BluOS also supports over 20 free and paid subscription services as well as supporting locally stored music libraries. With BluOS, the M33 retains all the audiophile features and further adds a range of facilities that will expand its capabilities yet simplifies ease-of-use at the same time. Operable with the BluOS app, the supplied remote control or through hands-free control with any Amazon Alexa or Google Assistant device, the M33’s front panel never needs to be touched.

"Recommended Component" Honors

Stereophile honored the NAD M33 by awarding it the magazine's coveted Recommend Component status for 2024.

According to Stereophile, "The soundstage was full and wide, and there was the impression of significant weight and body. The M33, in one well-integrated and handsome box, replaces all the traditional components and can be operated from a smartphone or a tablet. Keep your beloved speakers and let the NAD M33 do everything else. It will do it all superbly."

Stereophile Product of the Year

The M33 won Product of the Year honors from Stereophile. Writing about "the long-anticipated fade-away of physical media," Kal Rubinson says, "It takes this complicated ecosystem and makes it simpler than ever… The amplification technology inside the M33 – Purifi's Eigentakt – has the potential to win over even the most anachronistic audiophiles."

But that's not all! Stereophile also honored the M33 as Integrated Amplifier of the Year and as an Editor's Choice product. You can't do better than that, and for pristine audio performance from digital and analog sources, you can't do better than the M33.

"NAD's new Masters Series M33 is, quite simply, a work of art," notes Daniel Kumin, Sound & Vision, November 4, 2020. "The M33 combines state-of-the-art sound, power, and broad functionality in an elegantly conceived package."

Ed Selly terms the M33 "Jack of all trades… Master of most of them to be honest," in his December 11, 2020 review for avforums.com. "This is a breathtakingly competent piece of equipment that combines a comprehensive spec and excellent performance."

DIRAC Live Room Correction Onboard

Experts agree that room acoustics are the weakest link in most sound systems, with room reflections deteriorating tonal balance and dynamics. Dirac, one of the most highly regarded Room Correction systems available, not only adjusts for frequency response, but unlike other room correction systems, it also optimizes the impulse response. By optimizing the speaker/room interface, music sounds more natural and lifelike.

Supplied with the M33 is a precision microphone to measure the room at and around the listening position so your system can be precisely calibrated for optimum performance. Even the most sophisticated loudspeakers can be markedly improved using Dirac calibration. Each of the five Dirac memory slots can store a unique room measurement or different frequency target curves to suit a particular musical taste or genre. The M33 also supports Dirac’s advanced ‘Bass Control’* feature with two independent subwoofer outputs.

Flexibility Meets Long-Term Value

The M33 is very complete with a wide range of inputs and outputs. BluOS, Dirac, HDMI and other are already fully integrated. It will meet the requirements of the most demanding users. To minimize the risk of future obsolescence, the M33 comes with two MDC (Modular Design Construction) slots that allow for further expansion. NAD introduced the MDC platform well over a decade ago and allowed updating products with new technologies which didn’t even exist at time of introduction.

Connection and Wireless Flexibility

Whether you are looking to connect digital or analog sources, the M33 comes well equipped to accommodate all of these It has six digital inputs and three analog inputs, including MM phono. Around back, the rear panel hosts two sets of speaker outputs capable of bi-wiring and a stereo Subwoofer Output with a fully configurable Digital Crossover. Airplay 2 and Bluetooth AptX-HD allow for local wireless streaming from a phone or tablet.

Phono and Headphones Get Special Attention, Too

The M33 has a high-quality MM phono input that rivals specialized outboard units. Accurate RIAA equalization, a clever phase cancelling infrasonic filter, and a huge overload margin combine to bring out the best in LPs.

Headphone enthusiasts will delight at the sound of the discrete headphone amplifier, which is able to drive even planar and high impedance studio phones. With high voltage and low output impedance, headphones will sound their best. For those who wish to enjoy their headphones but don't want to be tethered to a cable, the integrated Bluetooth AptX-HD module makes it simple to possible to enjoy wireless headphones as well.

Attractive Design with Outstanding Ergonomics

The M33 employs a completely modern and fresh take on the traditional stereo amplifier, with features and performance for the future. The all-alloy casework is elegant yet practical. The single control knob for volume is supplemented by a colour TFT touchscreen display. Rigid panels with magnetic iso-point feet provide a solid foundation for the multi-layer circuit boards and intricate internal construction.

Smart Home Integration Made Easy

BluOS provides hands-free control with full integration of any Amazon Alexa or Google Assistant device. Through Airplay 2, control is also possible with Siri. Considerable effort has been spent to make the M33 fully compatible with all the leading smart home systems from leading companies like Apple, Crestron, Control4, Lutron, KNX and many others. This means that along with lighting, shades, HVAC, and security, the integrator or user can seamlessly control the BluOS multi-room music system from a common interface. All integrations are certified for reliable operation. The custom BluOS Apps for iOS and Android tablets and phones, as well as desktop control from Windows and Apple OS are available free-of-charge and are updated regularly.

Note: Some features will be available via a future software update

BluOS Adds Pandora and Presto Music Services

Bluesound is excited to announce the integration of the popular Pandora and Presto Music services into the BluOS platform.

Pandora offers exceptional music discovery features and curated radio stations. Its integration offers BluOS music lovers access to another seamless and intuitive way to enjoy their favorite tracks and discover new music based on listeners' tastes.

Presto Music specializes in classical and jazz recordings with high-quality content. In select markets, users can now savor Presto Music's vast collection of classical and jazz recordings. With a library boasting 200,000 albums in CD-quality and 34,000 albums in stunning 24-bit/192kHz, subscribers will revel in a focused, extensive, and continuously expanding catalog. The service is tailored with a powerful search engine designed explicitly for classical and jazz music, offering rich composers, artists, and genre profiles, recommendations, and featured releases.

To access these new services, simply update to the latest firmware and download the BluOS Controller App (version 4.2.0) from the Apple App Store, Google Play, or bluos.io/downloads.

Product Features

Overview

BluOS Streaming DAC Amplifier
Hybrid Digital Purifi Eigentakt™ amplifier technology
Continuous Power: 200W into 8/4 Ohms
32-BIT/384kHz ESS Sabre DAC
Dirac Live Room Correction
Color TFT touch display
BluOS multi-room Integration
2 x MDC Slots for Future Expansion
Wireless control with AirPlay 2 and aptX HD Bluetooth integration
Comprehensive digital and analog connectivity including HDMI eARC
Integrates seamlessly with leading smarthome control systems
MDC (Modular Design Construction) offers ability to upgrade to future digital formats as they become available. Two MDC slots provided
CI friendly- RS232 Serial Control Port. Trigger In/Out.
IR in with learning function

BluOS Section, Audio

Supported audio file format: MP3, AAC, WMA, OGG, WMA-L, ALAC, OPUS
Supported high- resolution audio file format: FLAC, MQA, WAV, AIFF
Sampling rate: Up to 192 kHz
Bit depths: 16 – 24

BluOS Section, Connectivity

Network connectivity: Gigabit Ethernet RJ45; Wi-Fi 5
Supported network file share protocol: Server Message Block (SMB)
USB: 1 x Type-A port for connection to USB memory stick (FAT32 or NTFS formatted) and supported peripherals
Bluetooth quality: aptX HD 5.0
Bluetooth connectivity: Two-Way (Receive and Headphone modes)

BluOS Section, User Interface

Supported operating system: Music playback from network shares on the following desktop operating systems: Microsoft Windows XP, 2000, Vista, 7, 8 to current Windows Operating Systems and macOS versions
Mobile Application Free BluOS Controller App available for download from the respective App stores of Apple iOS devices (iPad, iPhone and iPod), Android devices, Kindle Fire and Windows or macOS desktops
Front panel: 7-inch full color touch screen
Remote control: HTRM 2 remote control

Product Specs

Amplifier Section

Rated output power (ref. 20 Hz-20 kHz at rated THD, both channels driven): >200 W into 8 ohms; >380 W into 4 ohms
Rated output power, Bridge mode (ref. 20 Hz – 20 kHz at rated THD): >700 W into 8 ohms
Input sensitivity: 865 mV (ref. 200W 8 ohms, Volume maximum)
THD (20 Hz – 20 kHz): <0.003 % (1W to 200 W, 8 ohms and 4 ohms)
Signal-to-Noise ratio>98 dB (A-weighted, ref. 1 W out in 8 ohms); >120 dB (A-weighted, ref. 200 W out in 8 ohms)
Clipping power: >210 W (0.1 % THD 1 kHz 8 ohms)
IHF dynamic power: 8 ohms: 260 W; 4 ohms: 520 W
Peak output current: ≥25 A (in 1 ohm, 1 ms)
Damping factor: >800 (ref. 8 ohms, 20 Hz to 6.5 kHz)
Frequency response: ±0.2 dB (20 Hz -20 kHz); -3 dB at 60 kHz

Preamplifier Section, Line In

Input Impedance (r and c): 47kΩ/180pF
Input Sensitivity: 280mV (ref. 500mV out, Volume Maximum)
Maximum input level 20Hz-20Khz: 2 Vrms/8 Vrms (low sensitivity mode)
Tone Controls: Treble: ±10dB at 10kHz; Bass: ±10dB at 100Hz
Max Output Signal: 4Vrms (ref. 0.1% THD)

Preamplifier Section, Pre Out

Maximum output level: 3.9 Vrms (ref. 0.1% THD)
Signal-to-Noise ratio: >120 dB (A-weighted, ref. 2 V out)
Output impedance: 100 ohms

Preamplifier Section, Sub Out

Maximum output level: 1.1 Vrms (ref. 0.1 % THD 100Hz)
Signal-to-Noise ratio: >102 dB (20 Hz-20 kHz, ref. 1V out)
THD+N: <0.005 % (refer 1.1 V 20 Hz-200 Hz)
Output impedance: 680 ohms

Preamplifier Section, Phono

Input sensitivity: MM: 1.2 mV; MC: 100 µV
Input impedance (R and C): MM: 56 kohms/100 pF; MC: 100 ohms/280 pF
Signal to noise ratio (ref. 2 V Preout A-weighted): MM: >92 dB; MC: >76 dB
THD+N (ref 2V Preout 1kHz): MM: <0.003%; MC: <0.02%
RIAA response accuracy: MM/MC±0.2 dB 20 Hz -20 kHz

Preamplifier Section, Headphones

Output Impedance: 2.2ohms
Output power: >100 mW/32 ohms

General

Power Consumption: Auto Standby ON<0.5W; Idle Power <40W
Dimensions W x H x D: 17-1/8" x 5-1/4" x 15-5/8"
Weight: 21.4 lbs.

Product Warranty

2 Years

Parts & Labor

NAD Electronics Warranty Information

Product Manual

	NAD M33 Owner's Manual (PDF Format)

	NAD M33 Quick Setup Guide (PDF Format)

	NAD M33 Data Sheet (PDF Format)

	NAD M33 Design Story (PDF Format)

Recommended Component 2024 – Stereophile

"The soundstage was full and wide, and there was the impression of significant weight and body. The M33, in one well-integrated and handsome box, replaces all the traditional components and can be operated from a smartphone or a tablet. Keep your beloved speakers and let the NAD M33 do everything else. It will do it all superbly."

- Stereophile, March 15, 2024

"Jack of all trades… Master of most of them to be honest."

"It’s hard not to admire pretty much every facet of the design, engineering and execution of NAD’s flagship all in one. This is a breathtakingly competent piece of equipment that combines a comprehensive spec and excellent performance. It might share a house with a talented sibling but the M33 is a star too and, judged on its own merits, it comes Highly Recommended."

- Ed Selly, avforums.com, December 11, 2020

"NAD's new Masters Series M33 is, quite simply, a work of art."

"The M33 combines state-of-the-art sound, power, and broad functionality in an elegantly conceived package."

- Daniel Kumin, Sound & Vision, November 4, 2020

"The long-anticipated fade-away of physical media is finally actually occurring, because streaming services have become ubiquitous and also very good. Meanwhile, much other music has gone virtual, via downloads, ripped CDs, and the odd vinyl needle drop. And let's not forget about smartphones, tablets, internet radio stations, podcasts. Factor in multiroom audio and wireless speakers (and other output devices), and you have a music-reproduction ecosystem utterly different than it was just a few years ago—and far more complicated.

"Devices like the M33 bring order to the chaos. It takes this complicated ecosystem and makes it simpler than ever.

"At least as important for Stereophile and its readers is that it does all that with unassailable quality. Sure, there are people out there who will prefer the sound of their tube or class-A amplifier, but the amplification technology inside the M33—Purifi's Eigentakt—has the potential to win over even the most anachronistic audiophiles.

- Kal Rubinson, Stereophile, October 2020

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