The QSC KLA181 is a high performance powered 18 inch subwoofer designed for professional live sound, touring systems, and permanent installations. It features a built in 1000 watt Class D amplifier module, advanced DSP processing for optimized low frequency output, and versatile deployment options including pole mounting or suspension. With deep controlled bass and rugged construction, the KLA181 integrates seamlessly with full range line arrays or top boxes to deliver powerful low end performance. Key Features: 1000 Watt Internal Amplifier: Provides reliable and powerful continuous output for deep bass performance in demanding venues. 18 Inch Low Frequency Driver: Large vented transducer produces deep and accurate bass down to 33 Hz. High Acoustic Output: Capable of delivering up to 135 dB SPL peak for impactful and clear low frequencies. Advanced DSP Processing: Includes algorithms for transient control and bass clarity, along with protection circuitry to prevent clipping and ensure consistent performance. Flexible Mounting Options: Pole cup for mounting full range boxes, M10 rigging points for suspension, and versatile placement options for both touring and permanent installation.