Blog Posts - Power Amplifiers



TA8225 BTL Amplifiers circuits

There is my friend want a TA8225′s PCB. But I not have it. Thus I search on internet. The TA8225 is BTL audio power amplifier for consumer application. It is designed for 45W high power, low distortion and low noise. It contains various kind of...

Hi-Fi preamplifier with tone controls project circuit

The circuit features tune smooth bass, and treble is not spicy, with a very low distortion. Please below : more Features -Use low noise transistors -Frequency response range : 20Hz-20KHz -Total Harmonic Distortion Noise 0.001% at frequencies 20Hz-20K...

Gain Clone 40W+40W power amplifiers using LM3875

This is Gain Clone amplifiers circuit that sound quality is very good. We use a IC as main parts is LM3875, produced by the National Semiconductor, IC is the highest power amplifier 56watts at 8 ohms speaker, As well as IC amplifier Gain Card that ve...

100-150W Super Hybrid Low THD Power amplifiers using STK-4048

This amplifier series circuit is very special that low distortion about 0.003% only. The heart working of this circuit is the hybrid IC of Sanyo. It is usually found in expensive audio equipment. The ICs that uses has three wattages to choose the num...

Old low noise pre tone using RC4739

A stereo pre amplifiers with tone control circuit that has been popular for more than 40 years is this circuit which use the RC4739 as main components. Due to its features that the bass heavy, and treble sound is crystal clear. Due to its features th...

50W-75W Stereo power amplifier using TDA2050

We used the TDA2030 to build many power amplifier projects, but they have lower power than 30 watts. Today, we try to use the TDA2050, which has the output power about 50 watts that shape and easy to use as well. This project is stereo that easy to b...

Low volts stereo preamplifier with tone control circuit

This is the simple stereo amplifier for headphone with tone control circuit that use 1.5V X 2 only. It is used for mini MP3 player or other small source. I like it that use a few parts and low power. How it works To begin with this circuit will conne...

2 watts + 2 watts Stereo Using Three LM386

This is 2 watts + 2 watts Stereo small amplifiers using three LM386 ICs. It is cheap and easy to builds for beginner. A basic of amplifier The most normal power amplifier as Figure 1 that connected to directly a positive of speaker and the negative t...

Low Noise Pre Microphone Amplifier

Here is two low noise Pre microphone amplifiers. Which is simple circuit but high quality sound,includes devices that are selected very well. This circuit can be used to all normal microphone, for example: the dynamic microphone of Europe zone that h...

27MHz CB Amplifier Circuit

The V-MOS FET number VN66AF (as Figure 1)is produce of the Siliconix company, for outstanding features are as durable and high gain. Most application of this is a normal power amplifier circuit. It can be used as the RF amplifier circuit. Figure 1 th...

Tape head preamplifier using UPC1032

This pre-tape circuit is cheapest for beginner only. And easy to builds because use one IC-UPC1032 only as Figure 1. Fig1: The circuit diagram This is stereo can connect to the tape header that resistance between 200-600 ohms at output amplitude abou...

5 watts Class A amplifier using NE5532 and MJ2955

      Here is the 5 watts really class A amplifier using NE5532 and MJ2955 as based. This is best of quality sound.       We used popularly the many type of power amplifier. For example: Cla...

Linear opto isolator circuits

This is the linear opto isolator circuits that use a few parts and cheap. In circuit we use the opto compiler ICs number of MOC 5010 as based. It can be used many ways. For example ; separate the circuit from the power line, send audio signal, Electr...

LM386 audio amplifier circuit with PCB

This is an audio amplifier that can be used with a small 9 volt Battery Operated,Current use as little as 5 milliamps.And amplification up to 500 mW. Which is sufficient to expand the sound from a sound about or the CD Walk Man out to the small speak...

Power Amp Super Bridge 120W by IC TDA2030

This be Super Bridge 120W Power Amplifier by IC TDA2030 for you like the circuit amplifies that use the integrated circuit. and Transistor BD249 or TIP31 or TIP41 or C1061 and BD250 or TIP32 or TIP42 or A671. It is nice circuit and easy to use. Schem...

Easy Telephone Amplifiers circuit

This is an easy telephone amplifier circuit. It will increase the signal of the telephone lines up. Then, drive the relay to controls the large electric bells that louder than a general phone. This circuit is modified from the speaker protection circ...

200-360 watts class G MOSFET Power amplifier

This is the Class G MOSFET power amplifier which is high end for all your jobs. It have more feature, - maximum RMS output power: 200 watts at load 8 ohms or 360 watts at the load 4 ohms. - The frequency response range: 10Hz.-150kHz. - Minimum harmon...

TDA2822 stereo amplifier circuit with pcb

This circuit stereo power amplifier. By use integrated circuit number TDA2822 within be model Dual Amp give power watt at 1W +1W bandwidth expansion rates at 40dB 120kHz use power supply since 1.8V to 15volt and use current 6mA feed power supply 9vol...

Low noise tape head preamplifier

This is a low noise tape head preamplifier that good sound quality. Because use LM387N that is the low noise ICs and is designed for the specific preamplifier. Figure 1 is Circuit diagram of this project. Maximum the output at 1 volts which is is hig...

200 watts super bridge power amplifiers

This is a 200 watts super bridge power amplifiers, include the transistors as based of circuit, so suitable for signals from the bass guitar. It’s a high power, durable and cheap. Use it in the house, the sound quality also is good. In Figure 1...


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