If you are looking for a good quality set of cheap speakers for your PC, then the Trust SP-650Z speakers are a great choice. It consists of two satellite speakers and a futuristic looking subwoofer.
It produces a great sound for the money and the bass is phenomenal. They produce a loud sound and can go very high without producing distortion. As well as sounding great, they look great. These are a perfect choice if you are looking for buy some surround sound PC speakers on a budget.