speed controller

  • Just a thought:


    I have:
    a. car radio (2x25watt),
    b. 2 speakers (25watt)
    I buy:
    2 speakers (500watt)
    I need:
    an amplifier (verstarker) (2x500watt)
    I don´t need:
    a new radio
    --------
    I have:
    a. speed controler (10a@12v)
    b. Motor (10a@12v)
    I buy:
    motor(750w)
    I need:
    an amplifier (verstarker) (bwz. 1000w)
    I don´t need:
    a new speed controler
    --------


    of course my watts, amps and volts are just guesses, but the question is will this work? is it possible to adapt a pkw verstarker for this purpose and use a smaller speed controler?