I have a 22 inch screen, I always hook my MBP to it. Bought a new speaker, and found out it is power by usb port. I already use both of my usb port for my mouse and backlit keyboard. when ever i hook up my MBP to my 22inch screen i like to close my screen and case of this i use my mouse and keyboard. Any solutions? both Speaker and backlit keyboard is power sucking, if i buy a usb hub will it be able to handle it?