Too bad you came by these and not the H/K SoundSticks (and not the SoundSticks II), because they're USB, but are also powered by a unit in the subwoofer. You might, if you got this subwoofer, be able to wire the tweeters to it somehow.
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Cheers! :-) - JediJoker
Current: - "ProBook:" 15.4" MacBook Pro Core 2 Duo 2.33 GHz - Mac Classic II - Old PowerBook
Moved On: - "The Book of Power:" 12.1" PowerBook G4 Aluminum 1.33 GHz - Purple iMac