I have built an amplifier for my car as per the attached diagram. It works no problem howeve the volume control using the 100K pots is very minimal. I am sing my ipod as the pre amp. Also the qualit is VERY tinny any dirction will be greatly apprcated

 

The output of an ipod is meant to drive earphones which have very low impedances.

I would reduce the volume control pots to about 1k and make sure you specify log taper pots in your selection.

I would increase the value of the input capacitor from 1μF to 10μF and reduce the 4.7kΩ series resistor to maybe 1kΩ.

 

Thank you for the advice I will make the changes and then get back to you.

 

I would say your circuit is wrong as per page 3 of the datasheet.

http://www.paia.com/KRUKits/K143/tda2005_datasheet.pdf

 

I would say your circuit is wrong as per page 3 of the datasheet.

http://www.paia.com/KRUKits/K143/tda2005_datasheet.pdf

I would like to know where RodneyB got that schematic.

 

I got the circuit from the internet

Low Cost 2x20 Watt Stereo Amplifier Project by TDA2005

www.circuit-projects.com
​

& PITT's Electronics

Other than the volume control which I will make the adjustments recommended by Mr Chips the circuit works fine.

When I installed it into my car as soon as I turned the engine on there was a whining sound which got worse as I accelerated. What kind of suppression do I need to fit stop this

 

@RodneyB,

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