I've been wanting an external pair of computer speakers for my laptop but don't want the typical headset/mic cable along with it. on my computer the audio ports are on the side of the computer rather than the back and i would like it to look flush rather than having cables sticking out everywhere. i have a usb hub behind my computer and would like to keep everything back there. is there such thing as a 2.1 speaker set for computer that is powered by a single usb cable and the typical ac cable? thank you