NAD Masters M66 Streaming DAC-Preamplifier - Clearance / Open Box

NAD M66 BluOS Streaming DAC-Preamplifier

The NAD M66 BluOS Streaming DAC-Preamplifier is built to be the command center of a reference two-channel system—combining high-resolution streaming, flagship digital conversion, precision analogue control, and room correction in one expertly engineered component. A hand-selected ESS SABRE ES9038PRO DAC with NAD’s proprietary implementation delivers micro-detail, tonal nuance, and spatial accuracy without sounding etched or fatiguing. With BluOS onboard, the M66 streams major services, internet radio, and local libraries, while Dirac Live Room Correction helps optimize timing, imaging, and tonal balance in real rooms. Extensive connectivity includes MM/MC phono, HDMI eARC, AES/EBU, USB, optical/coax digital, and XLR/RCA analogue inputs, plus balanced/unbalanced outputs, four configurable subwoofer outputs, and a dedicated high-output headphone amplifier. Finished in an all-alloy chassis with a 7-inch color touchscreen and two MDC2 expansion slots, the M66 is designed for long-term ownership and future upgrades.

The NAD M66 is part of ListenUp's NAD Music Streamer Collection.

What It's Good At:

• Reference-grade streaming DAC performance with an ESS SABRE ES9038PRO at the core
• Precision system tuning with Dirac Live Room Correction and multi-subwoofer integration support
• Truly versatile connectivity for modern and legacy sources (HDMI eARC, phono, USB, AES/EBU, XLR/RCA)
• Clean, low-noise analogue stage with accurate channel balance and wide dynamic range
• Flexible system building with balanced/unbalanced outputs and four configurable subwoofer outputs
• Future-ready ownership with two MDC2 expansion slots and a robust all-alloy build

NAD M66 Full Specifications:

• Preamplifier Specifications
• THD (20 Hz – 20 kHz): <0.001% at 2V out
• Signal-to-Noise Ratio: >105 dB (IHF; A-weighted, ref. 500 mV out, unity gain)
• Channel separation: >120 dB (1 kHz)
• Input impedance (R and C): 56 kΩ + 100 pF
• Maximum input signal: >5.6 Vrms (ref. 0.1% THD); >8 Vrms (Analog Bypass)
• Output impedance: Source impedance + 22 Ω
• Input sensitivity: 185 mV (ref. 500 mV out, Volume maximum)
• Frequency response: ±0.2 dB (20 Hz – 20 kHz); ±0.2 dB (Analog Bypass, 20 Hz – 20 kHz)
• Maximum voltage output (IHF load): >5 V (ref. 0.1% THD); >10 V (Analog Bypass, ref. 0.1% THD)
• THD (20 Hz – 20 kHz): <0.001% at 2V out
• Signal-to-Noise Ratio: >105 dB (200 Ω source; A-weighted, ref. 500 mV out)
• Channel separation: >120 dB (1 kHz)
• Input impedance (R and C): 56 kΩ + 100 pF
• Maximum input signal: >5.6 Vrms (ref. 1% THD); >8 Vrms (Analog Bypass, ref. 1% THD)
• Output impedance: Source impedance + 22 Ω
• Input sensitivity: 92.5 mV (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)
• Channel separation: >126 dB (1 kHz)
• Input sensitivity: -20.25 dBFS (ref. 500 mV out (-6 dBV), max volume)
• Frequency response: ±0.2 dB (20 Hz – 20 kHz)
• 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 Ω
• 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: >80 dB (IHF; A-weighted, ref. 500 mV out, unity gain)
• Output impedance: 480 Ω
• Maximum voltage output (IHF load): >10 V (ref. 0.1% THD)
• Phono (MM/MC)
• THD (20 Hz – 20 kHz): MM <0.008% (ref. 2 V out); MC <0.02% (ref. 2 V out)
• Signal-to-Noise Ratio: MM >82 dB (A-weighted, ref. 500 mV out); MC >75 dB (A-weighted, ref. 500 mV out)
• Input impedance (R and C): MM 56 kΩ + 100 pF; MC 100 Ω + 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 1 kHz: MM >80 mVrms; MC >7 mVrms (ref. 0.1% THD)
• Headphone Output
• THD (20 Hz – 20 kHz): <0.002% (ref. 1 V out)
• Signal-to-Noise Ratio: >98 dB (32 Ω loads; A-weighted, ref. 0.5 V out, unity gain)
• Frequency response: ±0.3 dB (20 Hz – 20 kHz)
• Channel separation: >62 dB (1 kHz)
• Output impedance: Source Z + 4.7 Ω
• Maximum input signal at 1 kHz: MM >80 mVrms
• Power
• Power consumption: 0.5 W (Auto Standby ON, Network Standby OFF); 2.0 W (Auto Standby ON, Network Standby ON); 0.1 W (OFF mode / power switched OFF)
• 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 (network share playback): Microsoft Windows XP/2000/Vista/7/8 to current Windows OS and macOS versions
• Control app: Free BluOS Controller App for iOS, Android, Kindle Fire, Windows, and macOS
• Front panel: 7-inch full color touch screen
• Remote control: SRM1 remote control
• Streaming cloud services: Tidal, Qobuz, Qobuz Connect, Deezer, Spotify (including Spotify Lossless support), 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: 7 dBm ± 2 dBm
• Dimensions and Weight
• Dimensions (W × H × D): 435 × 133 × 387 mm (17 1/8 × 5 1/4 × 15 15/64 in)
• Net weight: 7.6 kg (16.7 lb)
• Shipping weight: 16.25 kg (35.8 lb)
• Shipping size (W × H × D): 569 × 258 × 519 mm (22 13/32 × 20 7/16 × 10 5/32 in)

NAD M66 Q&A:

Is the NAD M66 a streamer and a preamp, or do I need separate components?

Yes—M66 combines a BluOS network streamer, high-end DAC, and full-function preamplifier in one chassis, so you can run digital and analogue sources into a power amplifier directly.

Does the M66 support room correction?

Yes. It includes Dirac Live Room Correction and supports Bass Control features for optimizing low-frequency integration with subwoofers.

What music services can I stream with BluOS?

BluOS supports many major platforms including Tidal, Qobuz (and Qobuz Connect), Deezer, Spotify/Spotify Connect, Amazon Music HD, SiriusXM, and more, plus internet radio options like TuneIn and iHeartRadio.

Can I connect my TV to the M66?

Yes. The M66 includes HDMI eARC, allowing you to connect compatible TVs and route audio through your two-channel system with convenient control.

Does the M66 have phono inputs for a turntable?

Yes. It includes an MM/MC phono stage, supporting both moving magnet and moving coil cartridges.

How many subwoofers can I connect?

The M66 provides four configurable subwoofer outputs, making it ideal for advanced two-channel systems with multi-sub setups.

Does it work well with balanced (XLR) systems?

Yes. It includes balanced XLR inputs and supports balanced outputs, ideal for longer cable runs and low-noise system matching with high-performance power amps.

Is the NAD M66 future-upgradeable?

Yes. It includes two MDC2 expansion slots designed for future hardware upgrades as formats and technologies evolve.

NAD M66 Downloads:

NAD M66 Manual
NAD M66 Quick Start Guide
NAD M66 Data Sheet