Wednesday, July 15, 2009

14Watt Audio Amplifier + pre-amp and tone control

This is the schematic diagram of 14 watt power audio amplifier included the pre-amp circuit and tone control circuit. I think this is complete audio system, just need an input and output (speaker)... :)
14Watt Audio Amplifier + pre-amp and tone control circuit diagram

Use this power supply circuit:
14Watt Audio Amplifier + pre-amp and tone control circuit diagram

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

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:


lutendo said...

what is the input of a 14 watts and where do i connect it.i designed this and am submitting on the 06th of may.can you pls help me.

lutendo said...

and is it okay when i can supply the voltage of -9+9V?