Onkyo USB Digital Audio Processor MSE-U33HB (gt) 3 Port USB Hub - $12 (Somerdale)

Product Information Connect Onkyo's MSE-U33HB Digital Audio Processor to a USB port on your Mac and prepare to be amazed.
Its recording quality and clear, vivid sound reproduction rivals that of high-end stereo equipment, and is far superior to that of standard Mac systems.
Simple to install, this elegant piece of engineering completely replaces your Mac's internal audio circuitry, and handles all audio-processing tasks safely away from the harsh, electrical-noise-laden environment inside your computer, to provide a truly startling improvement in audio quality.
Platform Compatibility MAC Connectivity 1X Microphone, 1 X Audio-Line-In-Rcax2, 1X USB-4 Pin USB Type B, 1 X Audio-Line-Out-Rcax2, 3X USB-4 Pin USB Type A Enclosure Type External Box Type Sound Card Product Line ONKYO