Nad M 25 Brochure
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Page 1
NADs PowerDrive™ circuitry measures each channels dynamic impedance individually and computes the optimum power supply voltage required to drive the output stage for maximum power and effi ciency. PowerDrive permits high dynamic power and low impedance drive capability, while maintaining ultra low (<0.03%) levels of distortion. The M25 also incorporates NADs acclaimed switchable Soft Clipping circuit. Each channel has individual over current, DC, infrasonic and ultrasonic overload sensing and protection for complete reliability under even the most severe operating conditions. MASSIVE POWER SUPPLY The M25 utilizes NADs proven Holmgren Toroidal transformer design, in a massive size, to create a power supply that offers very well regulated voltage, and truly massive amounts of current. The Holmgren transformer design utilizes proprietary low leakage fi eld technology which is very low in both electrical noise (stray fi eld) and physical noise (buzz). Multiple 100,000 uF, 100V low ESR capacitors ensure a clean DC voltage supply for very low noise and truly explosive dynamics. Ultra low impedance copper buss bars are used exclusively throughout for power delivery and grounding. DETAIL ENGINEERING It is the many small details that differentiate a really great amplifi er from a merely adequate one. Buffered low impedance level controls allow system fi ne tuning without the distortion typical of most level control circuits. Custom designed gold plated speaker binding posts offer multiple connector options, while maintaining a large, corrosion- free, low impedance contact area. Input jacks are also custom designed for maximum performance. Even the feet that support the M25 are engineered to fi lter out vibration and provide maximum performance. PUTTING IT ALL TOGETHER The highly developed, yet elegantly simple circuitry of the M25, is matched with a brute force power supply to create one of the most powerful Home Theatre amplifi ers on the market today. Yet all this power is balanced by a liquid and transparent sonic signature that is subtlety nuanced and insightful. The M25 simply adds another dimension to surround sound that must be heard to be believed.
Page 2
Continuous Power, 20Hz-20kHz, all channels driven simultaneously at 4/8 ohms Rated Distortion (THD 20Hz-20kHz) Clipping Power (0.1% THD) IHF dynamic headroom at 4 ohms IHF dynamic power at 8 ohms IHF dynamic power at 4 ohms IHF dynamic power at 2 ohms Damping Factor Input Impedance Input Sensitivity Voltage Gain Frequency Response Signal/Noise Ratio Dimensions (W x H x D) Net Weight Shipping Weight >160 W (22.0 dBW) 0.03% >180 W 3.4dBW >220 W (23.4 dBW) >350 W (25.4 dBW) >460 W (26.6 dBW) ref. 8 ohms, 50Hz >180 1 Mohms;C = 180 pF 1250mV+/-50mV 29.0dB 20 Hz – 20 kHz ±0.2 dB - 3dB at 3 Hz/70 kHz >96 dB ref. 1 W >118 dB ref. 160W 17 x 7 7/8 x 18 3/8 435 x 200 x 465.6mm 96.3 lbs (43.7 kg) 112.3 lbs (51.0 kg) Preliminary Specifi cationsPreliminary Specifi cations