Active subwoofers can be divided into two basic categories: flat and classic square boxes that are placed behind the seat. Flat boxes can often be placed under the seat, in the luggage compartment or wherever there is a suitable place for them. Connecting an active subwoofer is the same as when you install a classic external amplifier in your car. Don't know how to choose? Write to us at doty@ahifi.cz and we will be happy to advise you.