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NAD M66
BluOS Streaming DAC-preamplifier
The NAD M66 BluOS Streaming DAC-Preamplifier is designed as the starting point of a high-performance two-channel system, bringing together streaming, digital-to-analogue conversion, analogue control, and room optimisation into a single, cohesive platform. With a flagship ESS Sabre DAC, precision analogue volume control, and advanced room correction, the M66 preserves the integrity of every source, allowing music to retain its tone, detail, and natural flow. Whether streaming, playing vinyl, or connecting external components, the M66 delivers a clear and composed presentation that reveals more of the performance, making it a natural partner for power amplifiers such as the NAD M23 V2.
Key Features:
- BluOS enabled for high-resolution streaming and multi-room music
- ESS Sabre™ ES9038PRO DAC and ES9822PRO ADC
- Ultra-precise analogue volume control for accurate channel balance and dynamic range
- Includes Dirac Live® Full Bandwidth licence and calibration microphone for full-range room correction
- 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
Specifications:
| Preamplifier specifications | |
| THD (20 Hz – 20 kHz) |
<0.001% at 2V out <0.0005% at 2V out <0.005% at 2V out MM: <0.008% (ref. 2 V out) MC: <0.02% (ref. 2 V out) <0.002% (ref. 1V out) |
| Signal-to-Noise Ratio |
>105dB (IHF; A-weighted, ref. 500mV out, unity gain) >105dB (200 Ohm source; A-weighted, ref. 500mV out) >108 dB (IHF; A-weighted, ref. 500 mV out, unity gain) >80 dB (IHF; A-weighted, ref. 500 mV out, unity gain) >84 dB (IHF; A-weighted, ref. 500 mV out, unity gain) >80B (IHF; A-weighted, ref. 500 mV out, unity gain) MM: >82dB (A-weighted, ref. 500 mV out) MC: >75dB (A-weighted, ref. 500 mV out) >98 dB (32 ohms loads; A-WTD, ref. 0.5V out, unity gain) |
| Channel separation |
>120dB (1 kHz) >126dB at (1kHz) >62 dB at 1kHz |
| Input Impedance (R and C) |
56 kohms + 100 pF MM: 56 kohms + 100 pF MC: 100 ohms + 280 pF |
| Maximum input signal |
>5.6Vrms (ref. 0.1% THD) >8 Vrms (Analog Bypass) >5.6 Vrms (ref. 1% THD) >8 Vrms (Analog Bypass, ref. 1% THD) at 1kHz MM: >80 mVrms MC: >7 mVrms (ref. 0.1 % THD) |
| Output impedance |
Source Impedance + 22 Ohm 480 Ohms Source: Z + 4.7ohms |
| Input sensitivity |
185mV (ref. 500mV out, Volume maximum) 92.5mV (ref. 500 mV out, Volume maximum) -20.25 dBFS (ref. 500 mV out (-6 dBV), max Volume -26.25 dBFS (ref. 500 mV out(-6 dBV), max Volume MM: 1.7 mV (ref. 500 mV out, Volume maximum) MC: 123 μV (ref. 500 mV out, Volume maximum) |
| Frequency response |
±0.2dB (20Hz - 20kHz) ±0.2dB (Analog Bypass, 20Hz - 20kHz) ±0.2 dB (20 Hz - 20 kHz) ±0.2 dB (Analog Bypass, 20 Hz - 80 kHz) ±0.2 dB (20 Hz - 20 kHz) ±0.3 dB (20 Hz - 20 kHz) |
| Maximum voltage output |
-IHF load >5V (ref. 0.1% THD) >10 V (Analog Bypass, ref. 0.1% THD) >10 V (ref. 0.1 % THD) >20 V (Analog Bypass, ref. 0.1 % THD) -IHF load >5 V (ref. 0.1 % THD) >10 V (ref. 0.1 % THD) -IHF load >5 V (ref. 0.1% THD) -IHF load >10 V (ref. 0.1 % THD) |
| 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 |
| BluOS | |
| 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 |
| Dimensions and weight | |
| Dimensions (W x H x D) *** | 435 x 133 x 387 mm |
| Net Weight | 7.6kg |
| Shipping Size (W x H x D) | 569 x 258 x 519 mm |
| Shipping weight | 16.25kg |
