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Why is switching amplifier better than linear amplifier in reproducing music? Music is a blend of sine waves, isn't it?


While any waveform theoretically consists of sine waves, that mathematical decomposition assumes that the waveform isperiodic, in other words, a repeating waveform. Musical instruments, on the other hand, produce waveforms with full sharp edges that even trained eyes have a difficult time figuring out what the fundamental frequency is, because even a single note produced by any instrument is full of attacks and decays (except for instruments that are based on natural resonance such as the pipe organ or the flute). A violin produces very complex waveforms full of high frequencies called harmonics. Harmonics are so named because their frequencies are multiples of the fundamental frequency of the note being played. Faithful reproduction of such complex waveforms requires an amplifier capable of very high bandwidth, and more importantly, with no crossover distortion. The most popular amplifiers use a class of amplifying circuit called class-AB amplifier. It is actually a compromise between the huge inefficiency of class-A amplifiers - the simplest circuit universally used in low power amplification - and the high distortion but higher efficiency of class-B amplifier. Class-A amplifiers theoretically have no crossover distortion. This is the main reason why audiophiles are willing to pay sky high prices for some class-A amplifiers. Likewise, NuForce's analog switching amplifier circuit has no crossover distortion. And while typical linear amplifiers have a bandwidth that is barely over 20 kHz - lower still in boomboxes and in conventional switching amplifiers -NuForce's analog switching amplifier uses proprietary technologies to achieve bandwidth up to ten times higher than typical linear amplifiers.Its huge bandwidth allows it to amplify complex music faithfully, much beyond the concept of high-fidelity. A good side effect of zero crossover distortion and huge bandwidth is a huge sound stage most music lovers never experienced before, because now spatial information contained in a stereo program is completely reproduced.

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