DDLinear speakers deliver an audio experience that's so remarkable you'll want to listen to your favourite music over and over. The reference series components are equipped with the latest advances in DDLinear technology for unparalleled sound clarity. This 3-way speaker is composed of 1.6cm horn tweeter, 5cm mid range, and 18cm woofer. All 3 parts are designed to create a perfect combination in your Toyota Alphard & Vellfire, providing both aesthetic and premium sound quality from Alpine. It comes with installation kit that will not make any damages to the car.