Hi Fi Amplifier Circuit – 2X12 Watts

HiFi or High fidelity is a term used to indicate equipment that reproduces a high quality of sound. The highlight of Hi-Fi equipment is inaudible noise or distortions and a natural frequency response. Hifi amplifiers are known to create sounds with utmost clarity so it is a dream of all music lovers to get their hands on one.

Of course, it is not just the amplifier that is required to get a no-noise sound output. But our project here only involves making the amplifier part ie, amplifier circuit.


Here is the circuit of a 2X12 watt HiFi  amplifier circuit using IC TDA 2616 from Phillips. This is a quite simple and robust circuit using only very few components. Being this small makes the circuit ideal for a portable power amplifier. This circuit delivers 12 Watts power on  8 Ohm speaker for each channel at +/- 12 V dual supply.

The TDA2616 is a  stereo power amplifier IC that comes in a 9-lead single-in-line (SIL9) plastic power package (SOT131). This IC is specially designed for mains fed amplifier circuits such as stereo radio, tape and television. The IC has a good gain balance of both channels and Hi-fi in accordance with IEC 268 and DIN 45500 standards. Also, the IC TDA 2616 has a special inbuilt circuit for the  suppression of noise signals at the inputs during switch-on and switch-off. This prevents click sounds during power on and power off.

Hi Fi Amplifier Circuit Diagram with Parts List

Hi Fi Amplifier Circuit Schematic
Hi Fi Amplifier Circuit Diagram



  • All capacitors except C10 & C9 are ceramic.
  • All capacitors must be rated 50V.
  • Use a well regulated and filtered +/- 12 V dual power supply that is able to provide at least 2 A continuous current.

TDA 2616 Pin assignment & layout

TDA 2616 PIN Description
TDA 2616 PIN Diagram and Configuration

We have more Audio Circuits in our website, that you may like to read;

1. Low Cost Amplifier

2. 50 Watt Transistor Amplifier

3. 3 Band Graphic Equalizer

4. Sound Shifter Circuit

5. Speech Amplifier Circuit



  1. sir please tell me capacitance tallrence please

  2. Hi if i just use normal 12v – 1A power supply adapter. And attach its positive to +12v and negative to -12v of your circuit. Will it work without giving noise.
    On standby when we haven’t connected anything to the input mostly circuits like this gives huge noise. I add potentiometer but nothing happens to make hum sound low. Can you please help me????

  3. I am tried this amp.
    But it sound is not clear it continous cracking .
    So help how can i overcome it

    • hi .. This Ranjan from bangladesh ..
      this is so simple circuits .. pls cheak this circuits without veritable resistor , and must use 220nf for input , and 8.2 ohm sires with 22nf capacitor .

      it must working and this time i am listening a song using this amplifier

  4. i have two woofers of 70 watt what type of amplifier i should need 70 watt or 140 watt ???

  5. This is good for about 7Wrms into 8ohms with a 12V supply. With a 16V split supply, this chip makes 12W into 8 ohms at .5% THD. C9 & 10 need only be 25 Volts. R1 & 2 should be about 2 ohms. Definately need a 4 sq in or larger heatsink.