How to Power my Class B amp with car battery

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I have a class b amp, i built, that I want to run some nice speakers in back, how do i go about getting the +/- voltages for my 741 op amp, and how do i power the mosfets (up to +/- 56V) from the car battery, without buing regulators and such??

I'm just basically confused on how my 12V/25Vrms car battery can be used to power them, do i need to build a supply or wht??

:xeye:
 
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