http://www.amazon.co.uk/Logitech-LS21-Stereo-Speaker-System/dp/B0017915WA/ref=sr_1_2?s=electronics&ie=UTF8&qid=1391381359&sr=1-2&keywords=speakers+for+a+pc
This is a cheap and chearfull set up, smaller ones can be bought but avoid usb ones, they are very tinny to listen to.