A polypropylene (PP) speaker is a type of speaker made from a polymer with a specific gravity of 0.92. The material is highly resistant to tearing and scuffing, and has a high-quality, consistent thickness. These speakers are usually made with a thick gauge PP sheet, but a thinner gauge is also available.

If you are looking for speakers that can give you good sound quality and still be light on your pocket then I am sure you have already heard about this product called the polystyrene or the plasti-tone. Many people don't know what this is; it is a new type of plastic speaker that is used in indoor speaker systems as well as outdoor speaker systems.