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Hi fi Audio Amplifier AK-170 The power amplifier circuit has been widely used in every electronic device that processes sound. Ampifier which means "amplifier" means to amplify sound input. Voice input can come from radio waves, microphones or digital files that are converted into analog signals. Power amplifiers are built using passive and active electronic components. In ancient times, electronics hobbyists used vacuum tubes or vacuum tubes as the main amplifier component. The drawback is that the power that the vacuum tube can provide is not large. To produce large power, it takes a lot of vacuum tubes that are installed in parallel. Transistors that developed later allowed greater output power to be produced, but with a smaller Printed Circuit Board (PCB) size. The growing era of the use of Integrated Circuit or IC is increasingly widespread so that it shifts the use of transistors. One IC that is often used is the TDA IC. In this power amplifier, the IC used is IC TDA 2030. IC TDA 2030 has a relatively small power but with a fairly reliable sound quality. The input voltage on the IC can be given at 12V so that it can be installed on a car without the help of a boost converter. Features of TDA 2030 1. Low-frequency class AB amplifiers are best suited for audio amplification 2. Can supply up to 20 Watts as output power 3. Input voltage between 6V to 36V (can be used for car amps) 4. There is thermal and short circuit protection 5. Easy to assemble