The JBL PRX918XLF subwoofer takes professional portable PA performance to a new level with advanced acoustics, comprehensive DSP, unrivaled power performance and durability—as well as complete BLE control via the JBL Pro Connect app. This 18" powered subwoofer is built from the ground up to leverage JBL’s most advanced acoustic innovations. A next-generation driver—powered by an ultra-efficient Class D amplifier—delivers clear, defined bass with smooth low-frequency extension at maximum volume. The PRX918XLF’s class-leading DSP package, accessible via onboard LCD or the JBL Pro Connect app, includes 6-band parametric EQ for system tuning and nuanced tonal control, plus a lowpass filter and 20ms delay. The JBL Pro Connect app provides complete hardware and DSP control of up to 10 speakers. Integrate with JBL EON ONE MK2, PRX ONE and EON700 systems, and access app-only functions including speaker snapshots and grouping. A protective speaker cover is also included.