lõppvõimendit

Lõppvõimendi, also known as a power amplifier, is an electronic device that amplifies low-power electronic signals such as the signal from a preamplifier or a radio receiver to a level sufficiently great to operate loudspeakers or other output devices. In essence, it takes a weak audio signal and makes it much louder. This is a crucial component in most audio systems, from home stereo systems and portable music players to professional sound reinforcement and musical instrument amplification.

The primary function of a lõppvõimendi is to increase the voltage and current of an input signal. This amplification process requires a power source, typically from the mains electricity or batteries, to provide the energy needed to boost the signal. The output of the lõppvõimendi is then fed to transducers like speakers, which convert the amplified electrical signal back into sound waves.

Lõppvõimendid can be categorized in various ways, including by their class of operation (e.g., Class A, Class B, Class AB, Class D), which describes how the active amplifying elements (transistors or vacuum tubes) are biased. Different classes offer trade-offs between efficiency, distortion, and power output. The design and quality of a lõppvõimendi significantly impact the overall sound quality of an audio system, affecting factors such as clarity, dynamics, and tonal accuracy.