Võimsusvõimendi

Võimsusvõimendi, known in English as a power amplifier, is an electronic amplifier that increases the amplitude of a signal with a power level C capable of driving an output transducer, such as a loudspeaker. It is the final stage in an audio playback system, taking a small electrical signal from a pre-amplifier and making it strong enough to move the speaker cone and produce sound. Power amplifiers are crucial components in stereo systems, home theaters, musical instrument amplifiers, and public address systems. They are characterized by their ability to deliver significant power output, measured in watts. Different classes of power amplifiers exist, including Class A, Class B, Class AB, and Class D, each with varying efficiency, linearity, and distortion characteristics. Class A amplifiers are known for their high fidelity but low efficiency, while Class D amplifiers are highly efficient, making them suitable for portable devices and high-power applications. The design and quality of a power amplifier significantly impact the overall sound quality of an audio system.