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The M3 is NAD’s concept of the ideal musical companion, capable of transporting the listener to that place where the music simply exists in its own perfect space. For this task we have pushed classical analog circuit design to unprecedented levels of performance. The total lack of audible noise and distortion is the result of some very sophisticated analog engineering, and rather surprisingly, the use of digital control.
The M3 features a Dual Mono design with separate unregulated, and discrete regulated supplies for different stages of the 2 channels. The twin custom-made “Holmgren” toroidal transformers use proprietary magnetic shielding technology. High current rectifiers feed low ESR 105C filter capacitors.
NAD’s PowerDrive technology measures load impedance continuously on each channel and adjusts the power supply voltage for maximum undistorted dynamic power into the connected speaker at all times and under all operating conditions. The signal processor also continuously measures temperature and average long term power and, based on this information, chooses the optimum voltage.
PowerDrive allows the M3 to sound far more powerful than its already impressive 180 watt per channel rating would suggest. Totally effortless sound, even at elevated levels, is the hallmark of the PowerDrive amplifier.
The M3 utilizes a wideband current-mode Class A voltage amp featuring large open loop compensated bandwidth, and running from low noise stabilised power supplies. NAD’s patented current amp output stage starts with < 0.02 % static and dynamic distortion open loop (before feedback), even into 3 ohms at 20-20k at all levels. By utilizing small amounts of feedback the circuit returns distortion levels at all audible frequencies that are at limit of measurement – less than 0.002%!
The M3 includes an entire host of convenient features to allow seamless integration into virtually any listening application. The M3 offers internal switching for two pairs of speakers and tone controls as well as a second Zone 2 output with independent commands and even its own remote control.
Front panel controls allow for direct access of all features as well. Performance features are many, and include a precision volume attenuator with 0.5dB steps and a range of 87.5db, a remote balance control with 0.5dB steps, and a Mode control which allows stereo, left only, right only and mono settings. Tone controls offer bass and treble adjustments as well as a "spectral tilt" option that is highly effective at correcting the tonal balance of many recordings by simultaneously increasing the bass and decreasing the treble (and vice versa) to create a warmer or cooler balance. There are also a second set of preamp outputs and a switchable high-pass filter for the internal amplifier, to allow easy implementation of any active subwoofer or for bi-amplification.
- M3 Dual Mono Integrated Amplifier Features- 180 watts X 2, 10Hz - 20kHz, with 0.03THD, both channels driven into 8 or 4 Ohms - Dynamic power of 280 watts at 8 Ohms, 480 watts at 4 Ohms, and 785 watts at 2 Ohms - PowerDrive - Dual stage high current/high voltage power supply - Dual Mono topology - Twin NAD Custom-Made "Holmgren" Toroidal transformer - Ultra precise multi-stage electronic volume control using discreet resistors - 7 inputs, including 1 balanced XLR - Tape/Zone 2 output (independent source selection, no volume control) - Speakers A B with custom 5 way binding posts - Biamp mode with selectable 40, 60, 80, 100 Hz crossover frequency on Pre Out 1 - Powered subwoofer - Main Amp input - Remote Bass and Treble controls with Spectral Tilt option - Remote Balance control with 0.5 dB steps - Selectable Mono, Left, Right, and Stereo options - RS-232 interface for advanced custom installations - 12V Trigger for advanced control options, 1 Out - 3.5mm IR Control jacks, 1 In and 2 Out - Detachable AC cord - M3 System Remote Control - ZR 3 second zone remote
