NAD
NAD Masters M66 BluOS Streaming DAC-Preamplifier
NAD Masters M66 BluOS Streaming DAC-Preamplifier
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M66
The NAD M66 BluOS Streaming DAC Preamplifier is designed to be the command centre of a reference two-channel system. Combining high-resolution streaming, advanced digital-to-analogue conversion, precision analogue control, and room correction technology, the M66 brings clarity coherence, and authority to every source it touches. With BluOS multi-room streaming, an ESS Sabre™ flagship DAC, and a meticulously engineered analogue stage, the M66 anchors high-performance systems with confidence. Pair it with the NAD M23 or M23 V2 power amplifier for a system defined by balance, control, and authenticity.
KEY FEATURES
- BluOS enabled for high-resolution streaming and multi-room music
- ESS Sabre™ ES9038PRO DAC and ES9822PRO ADC
- Ultra-precise resistor-ladder analogue volume control
- Dirac Live Room Correction and Bass Control
- Analogue direct mode with isolated signal paths
- MM/MC phono stage, HDMI eARC, AES/EBU, USB, optical, coaxial, RCA, and XLR inputs
- Balanced and unbalanced outputs plus four configurable subwoofer outputs
- Dedicated high-output headphone amplifier
- Two MDC2 expansion slots for future upgrades
- 7-inch colour touchscreen and all-alloy chassis
PRODUCT STORY
Built to Control the Signal. From Source to Speaker
At its core, the M66 is about signal integrity. Digital conversion is handled by a flagship ESS SABRE ES9038PRO DAC, handpicked for its exceptional dynamic range, ultra-low noise, and time-domain accuracy. NAD’s proprietary implementation draws out tonal nuance, spatial detail, and micro dynamics without exaggeration or glare. An advanced volume control handles analogue output with extreme precision, maintain accurate channel balance and maximizing dynamic range at any listening level. For the pure analogue listeners, analogue direct mode bypasses digital processing entirely, preserving the true character of external sources.
At the Centre of the Music Experience
BluOS transforms the M66 into a powerful network music streamer. Access over 20 streaming services, internet radio, and personal music libraries with support for up to 24/192 and full MQA decoding. Control the M66 from iOS, Android, or desktop, or pair it with other BluOS enabled devices as part of a multi-room music system. In a dedicated listening room or multi-room setup, BluOS delivers stability, responsiveness, and sound quality that meets the demands of serious listening.
Precision Tailored to Your Space
Every listening room is different. The M66 includes Dirac Live Room Correction to help optimize system performance with real-world environments. Using measurement-based filters, Dirac Live improves timing, tonal balance, and imaging—without altering the sonic characters of your system. With flexible configuration, multi-subwoofer outputs and support for Dirac Live Bass Control, the M66 allows for careful integration of low frequency performance while keeping the focus on coherence, musicality, and natural presentation.
Designed for Integration
The M66 connects seamlessly across analogue and digital domains. Inputs include MM/MC phono, HDMI eARC, AES/EBU, USB, optical and coaxial S/PDIF, balanced XLR, and line-level RCA—ensuring compatibility with modern and legacy sources alike. Balanced and unbalanced outputs support a wide range of power amplifiers, while a dedicated high-output headphone amplifier delivers detailed, controlled playback for private listening. Smart home compatibility with Control4, Crestron, RTI, Josh.ai, and more allows the M66 to integrate naturally into advanced control environments.
Engineered with Craftsmanship
Every detail is considered and deliberate with the M66. The aluminium chassis, precision-machined controls, and a beautiful 7-inch colour touchscreen reflect the NAD MASTERS design philosophy: modern and purposeful, with longevity in mind. Two MDC2 expansion slots enable future hardware upgrades, protecting your component as formats and technologies evolve. Inside, analogue and digital sections are physically isolated with independent power supplies to reduce interference and preserve signal purity.
SPECIFICATIONS
PREAMPLIFIER SPECIFICATIONS
| THD (20Hz - 20kHz) | <0.001% at 2V out |
| Signal-to-Noise Ratio | >105dB (IHF; A-weighted, ref. 500mV out, unity gain) |
| Channel separation | >120dB (1 kHz) |
| Input Impedance (R and C) | 56 kohms + 100 pF |
| Maximum input signal | >5.6Vrms (ref. 0.1% THD) >8 Vrms (Analog Bypass) |
| Output impedance | Source Impedance + 22 Ohm |
| Input sensitivity | 185mV (ref. 500mV out, Volume maximum) |
| Frequency response | ±0.2dB (20Hz - 20kHz) ±0.2dB (Analog Bypass, 20Hz - 20kHz) |
| Maximum voltage output | -IHF load >5V (ref. 0.1% THD) >10 V (Analog Bypass, ref. 0.1% THD) |
| THD (20Hz - 20kHz) | <0.001% at 2V out |
| Signal-to-Noise Ratio | >105dB (200 Ohm source; A-weighted, ref. 500mV out) |
| Channel Seperation | >120dB (1 kHz) |
| Input impedance | (R and C) 56 kOhms + 100 pF |
| Maximum input signal | >5.6 Vrms (ref. 1% THD) >8 Vrms (Analog Bypass, ref. 1% THD) |
| Output impedance Source Impedance | + 22 Ohms |
| Input sensitivity | 92.5mV (ref. 500 mV out, Volume maximum) |
| Frequency response | ±0.2 dB (20 Hz - 20 kHz) ±0.2 dB (Analog Bypass, 20 Hz - 80 kHz) |
| Maximum voltage output (IHF load) | >10 V (ref. 0.1 % THD) >20 V (Analog Bypass, ref. 0.1 % THD) |
| THD (20 Hz – 20 kHz) | <0.0005% at 2V out |
| Signal-to-Noise Ratio | >108 dB (IHF; A-weighted, ref. 500 mV out, unity gain) |
| Frequency response | ±0.2 dB (20 Hz - 20 kHz) |
| Channel separation | >126dB at (1kHz) |
| Input impedance | -20.25 dBFS (ref. 500 mV out (-6 dBV), max Volume |
| Maximum voltage output | -IHF load >5 V (ref. 0.1 % THD) |
| THD (20 Hz – 20 kHz) | <0.0005% at 2V out |
| Signal-to-Noise Ratio | >80 dB (IHF; A-weighted, ref. 500 mV out, unity gain) |
| Channel Separation | >126 dB (1 kHz) |
| Input sensitivity | -26.25 dBFS (ref. 500 mV out(-6 dBV), max Volume |
| Frequency response | ±0.2 dB (20 Hz - 20 kHz) |
| Maximum voltage output (IHF load) | >10 V (ref. 0.1 % THD) |
| THD (20 Hz – 20 kHz) | <0.005% at 2V out |
| Signal-to-Noise Ratio | >84 dB (IHF; A-weighted, ref. 500 mV out, unity gain) |
| Output impedance | 480 Ohms |
| Maximum voltage output | -IHF load >5 V (ref. 0.1% THD |
| THD (20 Hz – 20 kHz) | <0.005% at 2V out |
| Signal-to-Noise Ratio | >80B (IHF; A-weighted, ref. 500 mV out, unity gain) |
| Output impedance | 480 Ohms |
| Maximum voltage output | -IHF load >10 V (ref. 0.1 % THD) |
| THD (20 Hz – 20 kHz) | MM: <0.008% (ref. 2 V out) MC: <0.02% (ref. 2 V out) |
| Signal-to-Noise Ratio | MM: >82dB (A-weighted, ref. 500 mV out) MC: >75dB (A-weighted, ref. 500 mV out) |
| Input Impedance (R and C) | MM: 56 kohms + 100 pF MC: 100 ohms + 280 pF |
| Input sensitivity | MM: 1.7 mV (ref. 500 mV out, Volume maximum) MC: 123 μV (ref. 500 mV out, Volume maximum) |
| Frequency response | ±0.2 dB (20 Hz - 20 kHz) |
| Maximum input signal at 1kHz | MM: >80 mVrms MC: >7 mVrms (ref. 0.1 % THD) |
| THD (20 Hz – 20 kHz) | <0.002% (ref. 1V out) |
| Signal-to-Noise Ratio | >98 dB (32 ohms loads; A-WTD, ref. 0.5V out, unity gain) |
| Frequency response | ±0.3 dB (20 Hz - 20 kHz) |
| Channel separation | >62 dB at 1kHz |
| Output impedance Source | Z + 4.7ohms |
| Maximum input signal at 1kHz | MM: >80 mVrms |
| Power consumption | at Auto Standby ON and Network Standby OFF 0.5 W* at Auto Standby ON and Network Standby ON 2.0 W** OFF mode (Power switched OFF) 0.1 W |
DIMENSION AND WEIGHT
| Supported audio file formats | MP3, AAC, WMA, WMA-L, OGG, ALAC, OPUS |
| Supported high- res audio file formats | FLAC, MQA, WAV, AIFF, MPEG-4 SLS |
| Sampling rate | up to 192 kHz |
| Bit depths | 16 – 24 |
| Ethernet/LAN | Ethernet RJ45, Gigabit 1000 Mbps Wi-Fi Built In:Wi-Fi 5 (802.11ac), dual-band |
| Bluetooth Quality | Bluetooth 5.0 aptX HD |
| USB | Type A |
| 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** |
| Supported Hi-Res Audio File Formats | 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 | SRM1 remote control |
| Streaming cloud services* | Tidal, Qobuz, Qobuz Connect, Deezer, Spotify (also support for Spotify Lossless), Spotify Connect, Amazon Music HD, SiriusXM, LiveOne, HighResAudio, JUKE, Napster, Pandora, Presto Music. |
| Free internet radio* | TuneIn Radio, iHeartRadio, Calm Radio, Radio Paradise |
| Supports bit rate/sample rate | up to 24 bit/192 kHz |
| Frequency band | 2.402G- 2.480G |
| Maximum transmit power (dBm) | 7 dBm ± 2 dBm |
DIMENSION AND WEIGHT
| Dimensions (W x H x D) *** | 435 x 133 x 387 mm (17 1/8 x 5 1/4 x 15 15/64 ”) |
| Net weight | 7.6kg (16.7lbs) |
| Shipping weight | 16.25 kg (35.8 lbs) |
| Shipping Size (W x H x D) | 569 x 258 x 519 mm (22 13/32 x 20 7/16 x 10 5/32’) |
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