Tag Archives: Audio Power Amplifier

Ears and Speakers Protector

Posted on December 2, 2011 by Rend

Sometimes the output volume of amplifier is too high and hurts our ears. As well as hurting your ears, this incident could damage your loudspeaker. The circuit below can be used to protect both our ears and our loudspeakers from … Continue reading →

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General-Purpose AF Power Amplifier

Posted on February 17, 2011 by Rend

This is a schematic diagram of general-purpose audio frequency (AF) amplifier circuit. This circuit uses cheap 1/4-W  resistors, no high precision needed so 5%-tolerance of carbon or metal film units is good enough. This circuit has frequency response range from … Continue reading →

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LM1875 20 Watt Audio Power Amplifier

Posted on December 15, 2010 by Rust

With LM1875, we can build a low cost but high performance audio power amplifier. With 50V power supply, it can produce 20W output power for 4 or 8 ohm speaker. We can even get 30W output if we use 60V … Continue reading →

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