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DIY audio amplifiers circuit diagram electronics projects

DIY audio amplifiers circuit diagram electronics projects and other related audio projects like : power amplifiers, audio systems, audio filters, vu meters, tone control, audio equalizers and more .

High gain microphone preamplifier electronic project

A very simple high gain microphone preamplifier electronic project can be constructed using this circuit diagram .

This microphone preamplifier electronic project is based on transistors and is capable of about 70dB or more gain at audio frequencies . Gain of this circuit is approximately equal to the product of the hfe of the both transistors times in the ratio of the load resistance to the input resistance of the preamp . As an approximation , these resistance are usually similar in value (2 to 5k) for most applications , so this ratio can be taken as unity .
As you can see in the circuit diagram , this electronic project use some common electronic parts and it must be powered from a 12 volt DC power supply .

Circuit Diagram: 
High gain microphone preamplifier electronic project

LM4096 audio amplifier electronic project

This LM4096 audio amplifier electronic project circuit diagram is a very simple audio amplifier that will provide a maximum output power of 1 watt , using few external electronic parts .
The LM4906 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable
communication device applications. It is capable of delivering 1W of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a +5V power supply.

The LM4906 also has an internal selectable gain of either 6dB or 12dB. In addition, no output coupling capacitors or bootstrap capacitors are required which makes it ideally suited for cell phone and other low voltage portable applications.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components.

LM4096 audio amplifier electronic project circuit diagram

LA4440 audio amplifier circuit diagram electronic project

Using the LA4440 audio amplifier IC can be designed a very simple stereo power audio amplifier electronic project , that will provide a 6 watt output power into a 8 ohms load .
The circuit has good ripple rejection of 46dB, small residual noise, built in over voltage and surge voltage protection .

Some features of this audio amplifier IC are: minimum number of external parts required, small pop noise at the time of power supply ON/OFF and good starting balance, good ripple rejection : 46dB (typ.) , good channel separation , small residual noise (Rg=0) , low distortion over a wide range from low frequencies to high frequencies , built-in audio muting function ,built-in protectors .

LA4440 audio amplifier circuit diagram electronic project

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