Moving my old computer speakers to my iMac

On Thu, 10 Jan 2008 20:19:35 -0700, Howard Brazee <howard@[EMAIL PROTECTED]
>
wrote:

>I just got a 24" iMac and noticed it had one speaker plug.   The
>speakers I have available are a pair of Acoustic Research Powered
>Partner 570s, and a Logitech Z640 5.1 system that's plugged into a
>Phillips PCS805 Aruilium sound card that's USB'd to one of the two
>Windows machines I'm giving away.
>
>What options do I have without spending more money?


Note:   Obviously, since the Logitech has front and back input plugs,
I can't plug them all into the iMac directly.