So I have a Mac Mini G4 which I have been connecting to very large external speakers through the analog audio out port (headphone jack) for a couple years. It seems pretty clear that we have blown the analog out port so we're looking for a USB solution. Basically we need a USB device that will output audio to a 3.5 mm jack or 1/8 of an inch, either would work. What is the cheapest/best solution. The Mini is running Tiger.