TDA4935 is bipolar stereo amplifier IC that can be wired as a 2X15W stereo amplifier or a 30W mono BTL amplifier. The IC also features built in circuitry for over load protection and over temperature shut down. Here the IC is wired in stereo mode in order to deliver 15W power on each speaker. The circuit does not require a dual power supply and it can be powered from anything between 8 to 24V.Here I am using 24V for getting maximum output power.

Circuit diagram with Parts list.


  • Assemble the circuit on a good quality PCB.
  • The circuit can be powered from anything between 8 to24V.
  • Use 20W, 4 Ohm speakers for K1 and K2.
  • All electrolytic capacitors must be rated at least 25V