Above diagram is the schematic diagram of mono power amplifier which use power IC of STK-1050 as the main component. Build two similar circuit for stereo amplifier circuit.

Download STK-1050 datasheet for circuit reference:
Download Link

The circuit built based SSM2211. I have never heard about this IC before, this IC may be quite difficult to find in the market, so before deciding to make this circuit, you better look for information about availability of this component in the nearest electronics store.

Here the datasheet of SSM2211 IC: datasheet

Above diagram is the schematic diagram of stereo amplifier, build based integrated circuit STK4141II. This stereo amp will deliver about 25W power output on each channel. Take a note that a heatsink must be attached to the power IC STK4141II to prevent overheating.

Download STK4141II datasheet:
Download Link

You should have the datasheet to define the pin connections.

Circuit diagram for one audio input/output channel:

Download Download the STA5100 datasheet:
Download Link

Circuit design:

PCB layout:

Download TDA2003 Datasheet

Above circuit is an amplifier circuit which built based on single power IC STK082. This is a very simple and easy electronic project to built, very nice for student’s project.

Download the STK082 datasheet for the reference/information about STK082

Schematic diagram:

PCB layout:

Download this Datasheet LM4756 for the project reference.

The circuit build according to common tone control circuit, by applying two transistors FCS9014 in each channel, so there’re four transistors for this 12v stereo tone control.

Take a note that you must connect the circuit prior to the amplifier circuit. The output of tone control should be connected to the input of the amplifier. Any small signal NPN transistor including BC547B, 2N3904, C828, or C945 could be put to use to replace FCS9014.

The circuit has single input and single output (mono). You must build the similar circuit to get stereo output.

STK-0060II Features:

• IMST system
• Dual power supply
• Darlington pure complementary circuit
• Metal substrate used IMST^c makes good thermal stability

Download STK-0060 II datasheet include the application circuit from the following link:
Download Link



Circuit Description:
The LM1036 works as a DC controlled tone (bass/treble), volume and balance circuit for stereo audio system purposes in car radio, Tv as well as audio devices. An extra control input will allow loudness compensation to become simply effected. Four control inputs provide control of the bass, treble, balance and volume capabilities via application of DC voltages from a remote control system or, additionally, from four potentiometers which might be biased from a zener regulated supply provided on the circuit. Every tone response is defined by a single capacitor selected to give the preferred characteristic.

Tone Control Features:

• Wide supply voltage range of 9V to 16V
• Higher signal to noise, 80 dB typical for an input level of 0.3 Vrms
• Large volume control range, 75 dB typical
• Channel separation, 75 dB typical
• Lower distortion, 0.06% typical for an input level of 0.3 Vrms
• Tone control, 15 dB typical
• Few outer components needed

Note: Power supply input, Vcc could be anything in between 9V to 16V and also the output capacitors are 10uF/25V electrolytic.

Stereo tone control circuit source: http://www.electronic-circuits-diagrams.com/audioimages/audiockt13.shtml