NAD D 3020, Каталог

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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.
FDP
Full Disclosure Power
soft
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