In basic terms, a subwoofer is a speaker that is designed to reproduce low frequency bass. Some come with their own built in amplifiers, however some people decide to put together their own custom car audio system and choose each component separately. 15 inch car subwoofers are a popular size for many vehicle owners because they are not too big or too small and they provide incredible sound quality and the bass you want. There are other sizes available but for most the 15 inch is the most practical, affordable and useful.

There are many brands that make 15 inch car subwoofers such as Kicker and Alpine, for example. The price is going to vary depending on the manufacturer and features of the item. For around $84 Kicker has a Single Ohm subwoofer, this product is recommended for use with an amplifier which will drive up costs. As previously mentioned, some 15 inch car subwoofers come with the amplifier as part of the setup.