Components List:

R1, R9 ________ 1K ohm
R2 ____________ 120K ohm
R3, R4 ________ 1K2 ohm
R5, R6 ________ 33 ohm
R7, R8 ________ 1 ohm

IC ____________ TDA2005
Pot ___________ 10K ohm stereo

C1 C2 __________ 2u2/50V
C3 _____________ 10uF/25V
C5, C6, C8 _____ 100uF/25V
C7, C9 _________ 220uF/25V
C12, C13 _______ 2200uF/16V
C4 _____________ 100nF
C10, C11 _______ 100nF

This is a class AB stereo audio power amplifier designed for quality hi-fi applications using a power IC? TDA2005. It is easy to construct and has a minimum of external components. The module has output current protection and thermal protection. This is the data book circuit which produces an excellent sound. The supply voltage required for this kit is 8 – 18V DC at 1 to 2 Amps.

Maximum output power will only be obtained with a power supply of at least 2A at 15V DC, and using 2 ohm speakers (or 2 by 4 ohm speakers in parallel). However approximately 4W per channel can be obtained with only a 15V DC, 1A supply into 4 ohm loads.

The power supply should be well filtered to reduce mains hum, the on board capacitors alone are not adequate for this purpose but are necessary to ensure stability. Extra filtering is unnecessary if operating from a battery.

Kit Preview:

Download the manual of this 6-10W stereo audio amplifier circuit include the schematic diagram, components list and circuit operation:
[wpdm_file id=39]

Download TDA2005 Datasheet:
[wpdm_file id=40]

source: kitrus.com

This is the scheme diagram of 20 Watt stereo audio amplifier which use dual IC TDA2005, one IC for left channel and the another one for right channel. Each IC will give you 20 watt output, so the output will be 2×20 Watt. The supply voltage for this circuit is 8VDC to 18VDC, use regulated power supply for better audio output performance.

Use a good quality transformer (of course it wiil be more expensive) to get less noise. It will be another good way to use a sufficient battery to power the circuit. Keep the supply wires as short as possible. Input source should be isolated from the external noises too. It is recommended to use coaxial cable to connect the input audio.

Bottom PCB Layout:

Top PCB Layout and Component Placement:

20 Watt Stereo Audio Amplifier Technical Data:

• Performance of TDA2005M: (for this circuit); At 14.4 V supply voltage: 2 x 20 watts (stereo) into 4 Ohms.
• Distortion: Approx. 0.2% at 4 Watts into 4 ohm load.
• Frequency Range: Approx. 20 Hz to 22 KHz.
• Input Sensitivity: Approx. maximum 150 mV rms.
• Power supply: + 8 to 18 volts, approx. maximum 3.5 Amps per channel.