Preamps · NAD Electronics

M66

The M66 uses ESS Sabre ES9038PRO DAC and ES9822PRO ADC. Balanced output impedance 44 ohms per Stereophile measurements; unbalanced output impedance stated as 'Source Impedance + 22 Ohms' (interpreted as 22 Ohms). The spec table on the NAD product page appears to contain duplicate/overlapping sections (possibly for different input/output paths); figures used are the most authoritative set. Subwoofer outputs (2x balanced XLR, 2x unbalanced RCA, four channels total) not modeled as separate ports. MM phono impedance 56kΩ+100pF; MC phono impedance 100Ω+280pF. MM input sensitivity 1.7mV; MC input sensitivity 123µV. Headphone output impedance stated as 'Source Z + 4.7 ohms'. THD for DAC section <0.0005% at 2V out. Max PCM 24-bit/192kHz; DSD not supported natively. Analog Bypass mode extends bandwidth to 20Hz–80kHz. Two MDC2 expansion slots. HDMI eARC input for TV connection only. No USB-B for computer connection. Specs extracted from web sources: https://hometheaterhifi.com/reviews/amplifier/preamplifier/nad-masters-m66-bluos-streaming-dac-preamplifier-review, https://nadelectronics.com/products/m66-bluos-streaming-dac-preamplifier, https://www.soundstagehifi.com/index.php/equipment-reviews/1911-nad-masters-m66-streaming-preamplifier 1 spec(s) enriched from web reviews (https://nadelectronics.com/products/m66-bluos-streaming-dac-preamplifier, https://www.soundstagehifi.com/index.php/equipment-reviews/1911-nad-masters-m66-streaming-preamplifier). 1 spec(s) recalled from AI knowledge — VERIFY: maxCurrentMa.