NAD 3020 Technical Information, PowerDrive, Full Disclosure Power Ratings, NAD Soft Clipping

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FDP

FULL DISCLOSURE POWER

Technical Information

PowerDrive™

NAD receivers and amplifiers are well known for delivering amazing “real world” dynamic power. NAD’s exclusive PowerDrive technology provides high dynamic power and low impedance drive capability. PowerDrive’s “dual-rail” power supply delivers optimised internal voltage levels especially during the most demanding conditions: dynamic peaks, sweeping musical transients, deep-bass excursions that drive a loudspeaker into its most power-hungry impedance

range. It’s a little like the “kickdown” of a sophisticated automatic transmission—providing extra short-term power on demand. PowerDrive is one big reason why NAD AV receivers do not exhibit the dynamic compression, flattened imaging, or the strident harshness audiophiles so often decry as “receiver sound.” PowerDrive not only makes NAD receivers and amplifiers sound better, it makes them cooler

running, with improved efficiency, leading to greater reliability as well.

Full Disclosure Power Ratings

Power sells audio products, so many manufacturers tailor their designs to obtain the best power ratings that can be contrived. In today’s digital world, with uncompressed signals and multi-channel entertainment, these continuous power ratings drive designs that are inefficient, hot, heavy and expensive to produce. Even worse, the sound quality of many such designs can be thin, overly bright, and lacking in musical texture. And since the power produced is far less than that “promised” when driving 5 or 7 loudspeakers, the dynamic power required for the full intensity of an action movie scene or orchestral climax is simply not available.

NAD’s solution to this conundrum is to optimize our power supplies to drive real-world loudspeakers effectively. This requires a precisely regulated, high current power supply to be designed for each NAD amplifier and receiver. Thus we can rate our receivers with continuous 4 ohm loads, all channels driven simultaneously,

full bandwidth (20Hz - 20kHz), and at rated distortion. This is a far cry from the

commonly used FTC minimal requirement using 8 ohm dummy loads, and requiring no more than two channels to be stressed at a time, and those at an easy 1 kHz frequency, with no distortion specified!

Music or movie sound is not a uniform, unchanging signal such as continuous power ratings would suggest. Rather, it is dynamic, occurring in bursts of varying durations and constantly changing amplitudes. Unlike conventional amplifiers, NAD’s “smart” dual-stage power supplies are designed to handle the dynamic power required by today’s music and films more effectively. Furthermore, our amplifier designs produce outstanding low impedance drive capabilities, even when driving the most demanding loudspeakers in

a high-performance home theatre system. FDP is an important reason why NAD components offer a valuable alternative to the over-hyped receivers and amplifiers on the market today.

NAD Soft Clipping™

Created by NAD engineers who understood that no matter how much real- world power you give the people, someday, somewhere, someone will demand more. It is all too easy to keep setting the volume higher without realizing just how high you have turned it up. Switching in Soft Clipping will greatly reduce

the chance of damage. NAD’s patented selectable Soft Clipping circuit gently transforms the music waveform as the point of distortion (clipping) approaches, resulting in much clearer reproduction and possibly protecting your speakers from damage, especially tweeters.