Power Amplified Speakers from PC Power Supply

Greetings! I'd like to power my external PC speakers with my computer instead of using the bulky AC wall transformer/adapter that they were shipped with. The wall adapter is rated for +9VDC @ 1A. When I measured the output with a DMM, I get +12.5 Volts, so I presume the voltage goes way down once it is loaded. So, what I'd like to do is drill out a card slot blank, put in a cheap coaxial plug and wire that to one of the +12VDC PS connectors in my PC. What I don't know is whether or not my amplified speakers can take the somewhat regulated +12VDC. I really don't want to put a 3 Ohm, 3 Watt resistor in series with the speakers, and would prefer not to have to build up a DC to DC regulator circuit (i.e. LM317T). What I guess I'm looking for is whether or not someone has already done this, and what the results were. Anyone?

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Why not use a 7809 reg ?? You could just about hang it off the socket terminals, I would use a DC power socket and plug to avoid any confusion too :-)

-- Regards ........... Rheilly Phoull

I've got a cigarette lighter adapter for an obsolete Escort radar detector that has the 12vdc to 9vdc converter built in to a housed module--has the dc power jack built-in also. It might look kinda funny, but I might just drill a hole in the back of the case and add a cigarette lighter socket. I think the old radar detectors had to use 9vdc because of the Gunn Diodes. Does anyone know if newer radar detectors use the 12 to 9 vdc converters? Or are they simply powered from 12 vdc now-a-days? This would be good to know in case I decide to modify any other cases. Thanks!

Watt

My very antiquated radar detector ran off 12V. Note to self: get a more modern one.