NAD Masters Series M33 Stereo integrated amplifier
In its simplest form, the 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. With the employment of 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.
A versatile and powerful streaming amplifier
The NAD Masters Series M33 has an incredible list of features that make it an ideal centerpiece for a two-channel audiophile sound system. It produces a stable 200 watts per channel into an 8-ohm load or 380 per channel into 4 ohms. That gives you lots of clean power to work with, as well as compatibility with a wide range of speakers. This amp offers plenty of analog and digital inputs for making wired connections, along with multiple wireless music streaming options. And it offers built-in room correction and optional voice control.
A wealth of streaming features
If you like the convenience of wireless streaming, this amp has you covered: Bluesound's proprietary BluOS operating system gives you easy app-based access to popular online streaming services like Spotify®, Qobuz, and more, as well as your personal library of downloaded music, including high-res audio files. You can also enjoy lag-free multi-room wireless music when you add on Bluesound speakers and components for other rooms. Apple® AirPlay® 2 lets you stream directly from an iPhone® or iPad® and ask Siri to play Apple Music.
Two-way Bluetooth means you can play the audio from apps on your mobile device through the M33, or send music from the amp to compatible wireless speakers or headphones.
Convenient connections
For analog music fans, the M33 offers unbalanced RCA and balanced XLR inputs. A built-in phono stage lets vinyl lovers connect a turntable with moving magnet or moving coil cartridge.
And there are a plethora of handy digital connections on the rear panel, including:
dual optical and dual coaxial inputs for connecting a CD player, Blu-ray player, or output from a compatible TV
USB Type-A for connecting a thumb drive loaded with music
AES/EBU XLR input
HDMI ARC for enhancing dialogue, music, and sound effects from a compatible TV
Ethernet port for making a wired connection to your network
The back panel features two sets of binding posts for connecting pairs of speakers. If you want extra bass, the M33 includes two mono RCA outputs for connecting powered subwoofers. There's also a headphone jack and analog preamp outputs.
Advanced room correction
The M33 includes Dirac Live — one of the industry's best room-correction platforms. This software-based system uses the included calibration microphone to take precise acoustic measurements of your room, and creates a customized correction curve that fine-tunes the output of your speakers and subwoofers. You get smooth, clear sound that's uniquely tailored to your space.
Innovative Class D amplifier technology
This amp pushes Class D amplification performance to new limits thanks to HybridDigital Purifi Eigentakt™ technology. It helps the amp maintain even frequency response into lower impedance loads and minimizes the occurrence of digital clipping. This advanced design offers robust power output and accurate sound with minimal distortion, without the excess weight and cost associated with more traditional linear power supplies and Class AB output stages.
AMPLIFIER SECTION
Rated output power (ref. 20 Hz-20 kHz at rated THD, both channels driven)
>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 SPECIFICATIONS
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: ±6 dB at 10kHz Bass: ±6 dB at 100Hz
Max Output Signal
4Vrms (ref. 0.1% THD)
PREOUT
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
SUBOUT
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
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
HEADPHONES
Output Impedance
2.2ohms
Output power
>100 mW/32 ohms
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
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
Support for aptX® HD
Bluetooth connectivity
Two-Way (Receive and Headphone modes)
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 colour touch screen
Remote control
HTRM 2 remote control
POWER CONSUMPTION
Auto Standby ON
<0.5W
Idle Power
<40W
DIMENSIONS AND WEIGHT
Dimensions WxHxD **
435 x 133 x 396 mm (17 1/8 x 5 1/4 x 15 5/8”)
Net Weight
9.7kg (21.4lb)
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