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 when purchasing a subwoofer. 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 that is needed for a good listening experience. The type of subwoofer can also be a deciding factor when purchasing a subwoofer. A subwoofer that is a passive subwoofer will require an amplifier to be used in order to produce sound. Active subwoofers, on the other hand, will require an active crossover in order to produce the sound that is desired. The price of a subwoofer can also be a deciding factor when purchasing a subwoofer. A subwoofer that is budget-friendly will not have as many features as a subwoofer that is more expensive. However, a subwoofer that is more expensive may have better features and be easier to use.