NAD Master Series M66 BLUOS™ Ultra Streaming DAC Pre-Amplifier
The NAD M66 BluOS Streaming DAC Preamplifier is a true reference-grade control hub designed to elevate every aspect of a high-end two-channel system. Combining high-resolution BluOS streaming, a flagship ESS Sabre DAC and precision analogue volume control, it delivers exceptional clarity, balance and musical detail. With Dirac Live room correction and flexible connectivity—from phono to HDMI eARC and balanced XLR—it adapts seamlessly to any setup. Crafted with a premium aluminium chassis, touchscreen interface and future-ready MDC2 expansion, the M66 offers both performance and longevity for serious audiophiles.
Available with Professional installation in NY, NJ, and CT – Powered by Sound Waves .
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
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 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.
Preamplifier – Analog (Single-Ended)
| THD | <0.001% @ 2V |
| Signal-to-noise ratio | >105 dB |
| Channel separation | >120 dB (1 kHz) |
| Input impedance | 56 kΩ + 100 pF |
| Max input signal | >5.6 Vrms / >8 Vrms (bypass) |
| Output impedance | Source + 22 Ω |
| Input sensitivity | 185 mV |
| Frequency response | ±0.2 dB |
| Max output voltage | >5V / >10V (bypass) |
Preamplifier – Balanced
| THD | <0.001% |
| Signal-to-noise ratio | >105 dB |
| Channel separation | >120 dB |
| Input impedance | 56 kΩ + 100 pF |
| Max input signal | >5.6 Vrms / >8 Vrms |
| Output impedance | Source + 22 Ω |
| Input sensitivity | 92.5 mV |
| Frequency response | ±0.2 dB |
| Max output voltage | >10V / >20V |
Digital Input (DAC Performance)
| THD | <0.0005% |
| Signal-to-noise ratio | >108 dB |
| Channel separation | >126 dB |
| Input sensitivity | -20.25 dBFS |
| Frequency response | ±0.2 dB |
| Max output voltage | >5V |
Subwoofer Output
| THD | <0.005% |
| Signal-to-noise ratio | >80–84 dB |
| Output impedance | 480 Ω |
| Max output voltage | >5V / >10V |
Phono Input (MM / MC)
| THD | MM: <0.008% / MC: <0.02% |
| Signal-to-noise ratio | MM: >82 dB / MC: >75 dB |
| Input impedance | MM: 56 kΩ / MC: 100 Ω |
| Input sensitivity | MM: 1.7 mV / MC: 123 µV |
| Frequency response | ±0.2 dB |
| Max input signal | MM: >80 mVrms / MC: >7 mVrms |
Headphone Output
| THD | <0.002% |
| Signal-to-noise ratio | >98 dB |
| Frequency response | ±0.3 dB |
| Channel separation | >62 dB |
| Output impedance | Source + 4.7 Ω |
Streaming & Audio (BluOS)
| Formats | MP3, AAC, WMA, OGG, ALAC, OPUS |
| Hi-Res formats | FLAC, MQA, WAV, AIFF |
| Sampling rate | Up to 192 kHz |
| Bit depth | 16–24 bit |
Connectivity
| Ethernet | Gigabit RJ45 |
| Wi-Fi | Wi-Fi 5 (802.11ac) |
| Bluetooth | Bluetooth 5.0 (aptX HD) |
| USB | Type-A |
User Interface
| Display | 7" touchscreen |
| App | BluOS Controller (iOS, Android, Windows, macOS) |
| Remote | SRM1 |
Streaming Services
| Music services | TIDAL, Qobuz, Spotify, Amazon Music HD, Deezer, Pandora |
| Internet radio | TuneIn, iHeartRadio, Calm Radio |
Power Consumption
| Standby (network off) | 0.5 W |
| Standby (network on) | 2.0 W |
| Off mode | 0.1 W |
Dimensions & Weight
| Dimensions | 435 × 133 × 387 mm |
| Net weight | 7.6 kg |
| Shipping weight | 16.25 kg |
| Shipping size | 569 × 258 × 519 mm |
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