Volume control and tone control

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RodneyB

Joined Apr 28, 2012
697
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
 

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MrChips

Joined Oct 2, 2009
19,280
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.
 

Thread Starter

RodneyB

Joined Apr 28, 2012
697
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

 

Georacer

Joined Nov 25, 2009
5,154
@RodneyB,

As per the site's ToS, automotive modifications are prohibited in AAC.
As a result, this thread will be closed. Please don't try to re-create it.

You may find answers in one of the fora listed here.
 
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