Try the built-in headphone output first. If you are not happy with the result, start looking for an external USB sounda dapter (such as Edirol UA1).Audio- I am going to be hooking it up to my speakers, subs and amp and want good quality audio; I'm by no means an audiophile, I just want a nice sound.
Probably not, this is typically set on the amplifier. A system-wide equalizer might be available.As well, is there software that will allow my Mac Mini to control my subwoofers level?
I am not sure what you want. If you connect the audio ouptut to the AUX input of your car radio, you can use the radio's controls to switch the source back to tuner or CD. If you want to control this from the software, you will need to hack the butons or the remote controller for your radio and then use for example a Phidgets I/O board to simulate the buttons.Radio - I still want to access my radio if at all possible, so is there some sort of converter so that my Mac Mini can tap into my radio? As well, what piece of software would allow me to control it?