Quickly flood your vehicle with high-quality bass sound from our selection of Hertz active subwoofer drivers. A power bass subwoofer has an amplifier built into the enclosure, which saves space and makes installation simpler. All you have to do is set the subwoofer under the seat and connect it to the receiver. OnlineCarStereo.com is an authorized Hertz dealer with the latest active subwoofers in many shapes and power outputs. We provide free lifetime tech support with every order.