Hi there
I'd like to make a suggestion here to people wanting external speakers for things like laptops etc.

Go for BLUETOOTH wireless rather than USB ones since it saves using a USB port (especially on newer ultra books where the number of USB ports is limited anyway) and gets rid of messy wires. You can also pair these with your phone as well -- giving extra use for the speakers.

Sound quality of Blue tooth speakers is more than adequate for typical computer sound cards -- especially if playing typically compressed MP3 music from places like ITunes etc.

I don't know about you but I hate having visible wires all over the place anyway.