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Class G Amplifiers

What Is a Class G Amplifier? Class G amplifiers were developed to improve the efficiency of traditional Class AB designs without sacrificing their sound quality. Instead of operating from a single fixed power supply voltage, Class G amplifiers use multiple power supply rails.​At low listening levels, the amplifier runs from a lower voltage supply, reducing wasted energy. When the music demands more power, it automatically switches to higher voltage rails.​This approach significantly reduces heat while pr [...]  Read more >
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Class C Amplifiers

What Is a Class C Amplifier? Class C amplifiers are fundamentally different from the amplifier classes commonly used in home audio. Unlike Class A, B, or AB designs, a Class C amplifier conducts current for less than 180° of the input signal.​This extremely short conduction angle results in very high efficiency but introduces severe distortion, making Class C unsuitable for reproducing music.​Instead, these amplifiers are primarily used in radio-frequency (RF) applications, where resonant circuits recons [...]  Read more >
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Class A Amplifiers

Amplifier Classes Explained – Part 2 Class A AmplifiersWhat Is a Class A Amplifier?Class A is considered the oldest and purest solid-state amplifier topology. In a Class A amplifier, the output transistor (or output transistors in a push-pull configuration) conducts current during the entire 360° of the audio waveform.​Unlike other amplifier classes, the output devices never switch completely off. They remain biased at all times, even when no music is playing. This constant operation eliminates crossover [...]  Read more >
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Amplifier Classes Explained: The Complete Guide to Audio Amplifier Technologies (2026 Edition)

Amplifier Classes Explained: The Complete Guide to Audio Amplifier Technologies (2026 Edition) Amplifier Classes Explained – The Ultimate Guide The audio amplifier is one of the most important components in any sound system. Whether you're listening to music through a pair of bookshelf speakers, powering a professional concert venue, or enjoying a high-end audiophile setup, the amplifier determines how faithfully the original recording is reproduced. Since the invention of the transistor amplifier in the 1950s, engineers have developed numerous amplifier classes, each designed to solve specific eng [...]  Read more >
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Hybrid STK Amplifier Replacement Guide – Compatible Substitutes for STK, RSN and SVI Power Modules

Hybrid STK Amplifier Replacement Guide – Compatible Substitutes for STK, RSN and SVI Power Modules Hybrid Amplifier Modules – History, Replacements and Modern Alternatives Hybrid amplifier modules became one of the most important technologies in home audio equipment during the 1970s, 1980s and 1990s. Famous series such as STK, RSN, SVI and STV powered millions of stereo amplifiers, AV receivers, home theatre systems and hi-fi equipment around the world. Today many of these original hybrid modules are obsolete, making repairs increasingly difficult. However, understanding compatible [...]  Read more >
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