The CORE 10218SA is an 18” active subwoofer system. The CORE 10218SA features a one channel, Class D amplifier that is specifically designed to power its corresponding passive cabinet, the CORE 10218SP, but can be used in a full active line array setup if required or preferred. The CORE 10218SA is compact, lightweight and can be flown or ground stacked and possesses high output capability with low frequency extension. It contains a single Ultra-long 18” / 4” V.C. woofer is front loaded and the rear of the low frequency driver is reflex loaded to extend the Low frequency output to below the natural cut off point. The proprietary rigging system of the CORE10218SA is directly compatible with the CORE 102A, CORE 102P ad CORE 10218SP. The CORE 10218SA also features the latest digital signal processor and the NUCLEUS FIR loudspeaker management software.