The mini-jack was never meant to be a pro connector, and now it doesn’t need to be. USB DI -full transformer balanced output isolation to eliminate earth loops / ground hum and other extraneous interaction noise and distortion.
USB D.I. gets the audio from a client’s laptop computer into your professional audio system quickly and reliably. This little blue box plugs straight into a spare USB port on a computer – an action normally instantly recognised by the system’s software, which then simply prompts you to select the unit as the default audio output device. OSX/Windows generally does this all by itself – it’s genuinely ‘plug & play’, as it were. Confirmation that all’s well between the Audiobox and the computer is, at this point, indicated via a bright green glowing status LED. Nice and simple, just like plugging in a USB stick; no drivers required. The computer’s audio now comes out via the USB D.I. and is connected to the audio system via XLR mic cables