If you are looking for a set of cheap speakers for your PC or laptop, then the Advent ADE-210F should be on your shortlist. They are very affordable coming in at under £30 and they produce almost 15W of sound which is a good amount for such a cheap unit.
They comprise of a large subwoofer and two satellite speakers. The satellite speakers are ultra slimline so they look as good as they sound.
The sound quality is very good for the price and these are a great option for PC speakers on a budget.