Any DIY Karaoke with 3 band eq that operates on 12 volt car battery?

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Hi all,
I am in search of a 3 band graphic equalizer with microphone circuit that can be operated with a 12 volt car battery ( in an outdoor party etc. where there is no other power source).

Just the tone control/ mixer section with single supply.

Is there any circuit there that has been made/tested by anyone?
A PCB layout in pdf will be great.

Thank you in advance.

I made a mistake by starting this thread in the chip amps section. Sorry !
Admins, kindly move it. :(
 
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