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iMac Speakers as System Speakers

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Nov 13, 2001
I have been attempting to modify the iMac DV speakers for use in a PC speaker (the one that beeps). There is one problem. It uses much more than the 5v of power. I want to hook up a battery to it, so that when the 5v lead on the motherboard sends power, the power from the battery goes to the speaker instead. I was thinking of using a transistor for it, such as this:

will that work?
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