Just so you know, the internal speakers are muted when something is plugged into the mini-jack port, and all audio including system alerts will be routed there. You might not want that. With powered speakers or a DA/AD converter connnected to a usb port, you have independent control of what audio goes where.
There are also sound-pods, and -planks and whatever, with mics and mood-colors and stuff, that are usb connected, but someone else would have to advise you on that.