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Tech Hifi LLC  1 Liberty Street, Suite 2
Hanson, MA 02341-1127 USA

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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.


BluOS® Streaming DAC Amplifier


Rated output power (ref. 20 Hz-20 kHz at rated THD, both channels driven)>200 W into 8 ohms >380 W into 4 ohmsRated output power, Bridge mode (ref. 20 Hz – 20 kHz at rated THD)>700 W into 8 ohmsInput sensitivity865 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 power8 ohms: 260 W
4 ohms: 520 WPeak 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

Input Impedance (r and c)47kΩ/180pFInput Sensitivity280mV (ref. 500mV out, Volume Maximum)Maximum input level 20Hz-20Khz2 Vrms/8 Vrms (low sensitivity mode)Tone ControlsTreble: ±6 dB at 10kHz Bass: ±6 dB at 100HzMax Output Signal4Vrms (ref. 0.1% THD)

Maximum output level3.9 Vrms (ref. 0.1% THD)Signal-to-Noise ratio>120 dB (A-weighted, ref. 2 V out)Output impedance100 ohms

Maximum output level1.1 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 impedance680 ohms

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

Output Impedance2.2ohmsOutput power>100 mW/32 ohms

Supported audio file format*MP3, AAC, WMA, OGG, WMA-L, ALAC, OPUSSupported high- resolution audio file format*FLAC, MQA, WAV, AIFFSampling rateup to 192 kHzBit depths16 – 24

Network connectivityGigabit Ethernet RJ45
Wi-Fi 5Supported network file share protocolServer Message Block (SMB)USB1 x Type-A port for connection to USB memory stick (FAT32 or NTFS formatted) and supported peripheralsBluetooth qualitySupport for aptX® HDBluetooth connectivityTwo-Way (Receive and Headphone modes)

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 ApplicationFree 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 desktopsFront panel7-inch full colour touch screenRemote controlHTRM 2 remote control

For supported music service and partners please see

Auto Standby ON<0.5WIdle Power<40W
Dimensions WxHxD **435 x 133 x 396 mm (17 1/8 x 5 1/4 x 15 5/8”)Net Weight9.7kg (21.4lb)Shipping Weight18.4kg (40.6 lb)"