The QSC KLA12 is a professional-grade powered line array speaker system designed for optimal sound reinforcement in various live sound applications. Known for its exceptional audio performance and versatility, the KLA12 features a 12-inch woofer and a 1.75-inch diaphragm compression driver, providing a balanced and clear sound reproduction. With a built-in 500-watt continuous Class D power amplifier module, this speaker offers both power and efficiency. The line array configuration allows for precise vertical coverage, making it suitable for venues where consistent and even sound distribution is crucial. It is important to note that the specific listing being referred to is used and exhibits signs of wear and tear, potentially impacting its cosmetic condition but not necessarily its overall functionality.