SHARP SM-SX100 (1999) | Revolutionary Digital Amplification

 

Introduced in 1999, the Sharp 1-Bit Amplifier marked a breakthrough in high-end audio by redefining how sound is amplified. At a time when bulky analog amplifiers dominated the market, Sharp introduced a slim, precision-engineered digital amplifier based on its own original 1-bit delta-sigma modulation technology. Unlike conventional analog designs, Sharp’s 1-bit amplifier converts analog audio into a high-speed 1-bit digital signal, sampled 2.8 million times per second—equivalent to 64× the resolution of CD audio. Each moment of sound is encoded as a simple “1” or “0,” capturing even the smallest dynamic changes. The signal is then amplified digitally and reconstructed via a low-pass filter, delivering exceptional clarity, low noise, and minimal distortion. Despite its digital processing, the amplifier is widely praised for its natural, realistic sound, astonishing listeners with its ability to reproduce music with remarkable detail and musicality. Audio engineers and enthusiasts alike recognized it as a pioneering implementation of delta-sigma amplification in a full-scale high-end amplifier. The amplifier features a slim aluminum chassis with a refined hairline finish, supported by distinctive peacock-green spike feet that reduce vibration and resonance. A solid aluminum volume knob adds both tactile precision and visual authority. Even decades later, the design remains timeless, reflecting Sharp’s meticulous engineering philosophy. The success of Sharp’s 1-bit amplifier (notably the SM-SX100) proved that digital amplification could rival—and surpass—traditional analog designs. Its efficiency and compactness later allowed 1-bit technology to be adopted across a wide range of high-quality audio devices and consumer electronics, cementing its place in audio history. Specifications: Rated output 100W+100W (8ohm) | Frequency response 5Hz to 100kHz | Dimensions (W/H/D) 472x89x462mm | Weight 18,5kg

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