M66

Masters BluOS Streaming DAC – Preamplifier

The Masters M66 BluOS Streaming DAC-Preamplifier is a revolutionary hi-fi component that combines an audiophile-grade DAC with a high-resolution multi-room music streamer. Featuring Dirac Live Room Correction and Dirac Live Bass Control, its elegant design and vibrant 7″ touchscreen exudes quality and class. Pair it with NAD’s M23 power amplifier for a stunning system that excels technologically, sonically, and visually.

Peak Performance

The digital section of the M66 employs ESS Technology’s flagship ES9038PRO Sabre DAC, an audiophile-grade design acclaimed for its ultra-low noise and distortion, exceptionally wide dynamic range, and superb time-domain performance.

For volume adjustment, the M66 employs an ultra-precise resistor-ladder control circuit. Compared to traditional analogue circuits, the M66’s digital volume control markedly reduces thermal and related distortions, maximises dynamic range, and more accurately matches left- and right-channel output across the entire volume range.

The M66 is the first component to feature NAD’s innovative Dynamic Digital Headroom (DDH) circuitry. When enabled with a control in the BluOS app, DDH eliminates digital inter- sample peak clipping distortion, which can occur during digital-to-analogue conversion of sudden high-frequency transients. The benefits are especially obvious with percussion instruments: cymbals are less splashy and more realistic; rim shots are less strident and more impactful.

Pure Analogue

To enable functions like Dirac Live Room Correction and Dirac Live Bass Control with all signal sources, analogue signals are converted to digital by ESS Technology’s ES9822PRO flagship ADC. However, the M66 has a selectable Analogue Direct mode that bypasses all digital processing. The M66 has separate signal paths for digital and analogue sources, and separate power supplies for the digital and analogue sections, so that analogue signals are unaffected by digital interference when the Analogue Direct mode is engaged. Users can even disable the M66’s Wi-Fi and Bluetooth circuitry to minimize RF interference.

Connect Everything

With its full suite of analogue and digital inputs, the M66 can accommodate all user source components. For vinyl enthusiasts, there’s an ultra-low-noise MM/MC phono stage with precise RIAA equalization, high overload margins, and an innovative circuit that removes infrasonic noise without compromising bass response. For TV and movie viewing, the M66 has an HDMI eARC interface for connection to an HDTV. In addition, the M66 has two coaxial and two optical S/PDIF inputs, an AES/EBU balanced digital input, two sets of RCA analogue inputs, and one pair of XLR balanced inputs.

Ethernet and Wi-Fi networking
BluOS network streamer provides access to over 20 streaming services, including  several that deliver lossless and high-resolution audio  
Flagship ESS Sabre DAC and ADC chips  
Innovative Dynamic Digital Headroom (DDH) circuit eliminates digital intersample  peak clipping distortion  
Full MQA hardware decoding and rendering  
Optional Analogue Bypass Mode  
Separate signal paths for digital and analogue sources; separate power supplies for  digital and analogue sections  
Support for Apple AirPlay 2, Spotify Connect, Tidal Connect  
Seamless integration with smarthome control systems such as Crestron, Control4,  ELAN, RTI, URC, and others  
Amazon Alexa, Google Assistant, and Apple Siri voice control  
Dirac Live Room Correction  
Four balanced and four unbalanced subwoofer outputs  
Dirac Live Bass Control enables seamless blend between the subwoofer(s) and main  speakers, and smooth bass response throughout the listening area  
Ultra-quiet MM/MC phono stage with precise RIAA equalization, high overload  margins, and infrasonic filter  
HDMI port with eARC support  
Two optical and two coaxial S/PDIF inputs, one AES/EBU balanced digital input, two  pairs of RCA line-level analogue inputs, one pair of XLR balanced inputs  
Dedicated headphone amplifier with low output impedance and very high output  voltage capability  
Ultra-precise resistor-ladder digital volume control  
7′′ front-panel touchscreen  
Elegant aluminum casework  
Two MDC2 expansion slots for adding future capabilities  
IR remote