IMPACT-X18B is an 18″ passive subwoofer from our IMPACT-X Series — delivering deep, controlled low-end reinforcement with the power and durability demanded by professional live sound and installation environments. Handling 500 W AES (RMS), 1000 W programme and 2000 W peak power with a maximum SPL of 133 dB at 1 m, it features a custom Wharfedale Pro 18″ LF driver with a 2.5″ voice coil, delivering solid bass response from 30 Hz to 250 Hz. Designed to pair seamlessly with Impact-X full-range loudspeakers, it provides extended low-frequency performance for a complete system. Constructed from premium MDF and finished in our hard-wearing polyurea Tough-Tone paint, IMPACT-X18B is built to last.