The ts-wx300a features a light-weight and strong impp ™ (injection-moulded polypropylene) composite speaker cone, that provides solid and rhythmical bass. It also features a class-d amplifier that is built into the side of the enclosure, magnifying the bass to high volumes, however also making it simple to set up as it can save space and installation time. The class-d amplifier also has various settings ensuring the user can get the type of bass they want, depending on their own taste in music. Built in amp pre-loaded subwoofer enables to enjoy a high quality bass sound easily in a cars and truck. High sound quality operational amplifier njm 4580 is set for analog circuit. This design are able to recreate a high quality bass sound with built-in amplifier.