Professional car audio accessories are products designed for use in automotive audio systems and are available for purchase for amateurs and professionals alike. Accessories include amplifiers, speakers, subwoofers, tweeters, wires, cables, and other related equipment used in aftermarket car audio systems. Professional car audio accessories are intended to improve sound quality and provide convenience features such as Bluetooth compatibility and remote control. Professional grade car audio accessories are usually more durable and offer higher performance than their amateur counterparts. Additionally, they may come with online support and warranties.