Thursday, September 15, 2011

30W Transistored Amplifier Circuit with Low Distortion Feature

30W Transistored Amplifier Circuit with Low Distortion Feature

This is the 30W transistored amplifier circuit diagram featuring ultra low distortion. The circuit use MJE2011 and MJE2021 power transistor as the final amplification. Although this is an old circuit, but it doesn't lose the modern amplifier with power ICs and power MOSFETs.

30W transistored amplifier circuit page source: http://www.4qdtec.com/pwramp.html

About Audio Amplifier
An audio amplifier is an electronic amplifier that amplifies low-power audio signals (signals composed primarily of frequencies between 20 - 20 000 Hz, the human range of hearing) to a level suitable for driving loudspeakers and is the final stage in a typical audio playback chain.

The preceding stages in such a chain are low power audio amplifiers which perform tasks like pre-amplification, equalization, tone control, mixing/effects, or audio sources like record players, CD players, and cassette players. Most audio amplifiers require these low-level inputs to adhere to line levels.

While the input signal to an audio amplifier may measure only a few hundred microwatts, its output may be tens, hundreds, or thousands of watts. More explanation about power audio amplifier can be found at wikipedia.org

This is a video tutorial about how to a very simple audio amplifier based on the LM386 amplifier chip. It can be built for less than $20 (or might be less than $8 in some countries) and used to amplify any low level audio signal including a guitar, bass or mp3 player.

Watch the video:

No comments: