There are a few things to consider when purchasing a subwoofer. The size of the subwoofer, the type of subwoofer, and the price. The size of the subwoofer can be a deciding factor. A subwoofer that is small enough to fit in a small room or office will be easier to use and will be less expensive. However, a subwoofer that is too small will not be able to produce the sound quality that is desired. The type of subwoofer can also be a deciding factor. A subwoofer that is a ported subwoofer will produce a better sound quality because the sound is spread out over a larger area. A ported subwoofer will also be more expensive. The type of subwoofer can also be a deciding factor when it comes to price. A subwoofer that is a pre-amp will be less expensive than a subwoofer that is a woofer. However, a pre-amp will not be as powerful and will not be able to produce the same level of sound quality.