Power is a critical component to sound quality. The demand placed on amplifiers by today's elaborate home theater systems requires additional headroom so that they reproduce clean sound free from the distortion of a taxed amplifier. Fortunately for the M25, at 160-watts per channel, it is one of the most powerful amplifiers built today. It's one of the cleanest amplifiers with a rated distortion of 0.03 (All channels driven simultaneously, from 20Hz to 20kHz.) The M25 easily exceeds THX's most stringent certification level, Ultra 2.
The M25 is actually made up of seven individual mono block amplifiers with each channel using a balanced junction FET input stage to eliminate cross-talk, resulting in exceptionally low levels of noise and distortion. Additionally, NAD employs a unique electronic ground isolation circuit to prevent ground loop noise in the system-a common problem with many complex multi-channel systems.
NAD's proprietary PowerDrive circuitry measures each channel's dynamic impedance individually and computes the optimum power supply voltage required to drive the output stage for maximum power and efficiency.
The M25 utilizes NAD’s 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 field technology which is very low in both electrical noise (stray field) 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.
- THX Ultra 2 Certified - 7 X 160 watts Full Disclosure Power, 20Hz - 20kHz, at less than 0.03THD with all channels driven simultaneously into 8/4 Ohms - PowerDrive(tm) - Dynamic power of 220 watts at 8 Ohms, 385 watts at 4 Ohms, and 485 watts at 2 Ohms - NAD's Custom-Made "Holmgren" transformer - NAD Soft Clipping(tm) - Precision low noise Input Level Controls - Custom 5 way Binding Post< - 12V Trigger for advanced control options, 1 in - Detachable AC cord
