About TDA1910:
The TDA 1910 is a monolithic integrated circuit in MULTIWATT® package, intended for use in Hi-Fi audio power applications, as high quality TV sets. The TDA 1910 meets the DIN 45500 (d = 0.5%) guaranteed output power of 10W when used at 24V/4W. At 24V/8W the output power is 7W min.

Download the TDA1910 datasheet

Note:

• This circuit using splitted power supply, please see the IC datasheet for the recommended power supply voltage.
• Use heatsink on the chip to prevent over heating.

Download the power IC STK4231II datasheet

Schematic diagram:

Component Part list:

PCB Layout:

Component placement:

Download STK465 datasheet

Schematic diagram:

PCB layout design:

Split power supply:

Here the TDA2040 datasheet, use this database for your project reference.

Component part list:

R1 ____________ 200 Ohm
R2 ____________ 200K
R3 ____________ 30K
R5 ____________ 1K
R6 ____________ 5K
R7,R10 ________ 1 Meg (5%)
R8,R9 _________ 0.4 Ohm 5W
R11 ___________ 10K Pot
R12,R13 _______ 51K
R14 ___________ 47K

C1 ____________ 100uF/35V
C2 ____________ 0.011uF
C3 ____________ 3750pF
C4,C6 _________ 1000pF
C5,C7,C8 ______ 0.001uF
C9 ____________ 50pF
C10 ___________ 0.3uF
C11,C12 _______ 10,000uF/50V
U1,U2 _________ 741 Op Amp
U3 ____________ ICL8063
Q1 ____________ 2N3055
Q2 ____________ 2N3791

Audio amplifier transistor driver ICL8063 is a discontinued component, you may have trouble to find this part at electronic component store around your place.

Note:

1. Distortion is less than 0.1% up to 100HZ and increases to about 1% at 20kHz.
2. I haven’t been able to find anyone who sells a suitable T1. You can always use two 24V 5A units in series. If you are building two amps (for stereo), then I would suggest using an old microwave transformer and rewinding it.
3. Q1 and Q2 will require heatsinks.

Source: electronic-lab

KA2211 is a dual audio power amplifier for consumer application. It is designed for high power, low dissipation dan low noise. Is also contains various of protectors and suitable for car audio power amplifier with high performance.

Read more about this KA2211 amplifier circuit

Component part list:

R1_____________ 150R
R2, R3, R5_____ 10K
R4_____________ 680R
R6_____________ 22K
IC1____________ TDA 7294
Heatsink

C1____________ 1u5F or 1u
C2____________ 2n7F
C3, C6________ 22uF 63V
C4, C5________ 10uF 63V
C7, C9________ 2200uF 50V
C8, C10_______ 100nF

With the addition of a handful of parts and a suitable power supply this module will deliver over 50W RMS into 4 or 8 ohms with < 0.1% Total Harmonic Distortion (THD) and < 0.1% Intermodulation Distortion (IMD).

More about 50W Power Amplifier

The TDA1553CQ is a monolithic integrated class-B output amplifier in a 13-lead plastic DIL-bent-SIL power package. It contains 2×22 W amplifiers in BTL configuration. The device is primarily developed for car radio applications.

The TDA1553CQ contains two identical amplifiers with differential input stages and can be used for bridge applications. The gain of each amplifier is fixed at 26 dB.

Source: 22W Stereo Car Audio Amplifier circuit

Component part list

R1 _____________ 1K
R2 _____________ 1M
R3 _____________ 22K
R4 _____________ 10K
R5 _____________ 180K
R6 _____________ 1R

IC1 ____________ LM1875

C1 _____________ 1uF 50V
C2,6 ___________ 100nF
C3 _____________ 22uF 63V
C4 _____________ 0.22uF
C7,5 ___________ 220uF 50V     

Miscellaneous:
Fuse holder & cover
2 amp fuses

IC LM1875 is the main component of this circuit. With few additional external components, this circuit will give you good audio quality. So, make your own amplifier with this circuit.

Detail explanation and how it works, please visit this 25W audio amplifier page.

You can add some resistors in parallel connection for more audio input. To adjust the volume for each input channel, add linear trimmer or potentiometer with configuration: pin1> ground; pin2>output; pin 3>input.