Depending on the source of power, a car subwoofer can be suitable for custom car audio, and example for one or a smooth-to-the-touch feel and the quality of the audio. They are best for portable car audio systems and a portable wireless speaker subwoofer is ideal for those who want to improve the quality of their sound.
Subwoofers are one of the most commonly used materials in a car audio system. Aluminum is one of the most commonly used materials for car and am audio.