The Wharfedale Pro Delta X18B is a passive bass-reflex subwoofer built around a custom 18-inch low-frequency driver with a 4-inch voice coil. It exists to reproduce the frequencies that full-range cabinets cannot move convincingly - the kick drum punch, bass guitar fundamentals, and low synth notes that give live music its physical impact. Power handling is rated at 800 W continuous, 1600 W programme, and 3200 W peak into 8 ohms, with 99 dB sensitivity producing a calculated maximum SPL of 134 dB. Frequency response extends down to 38 Hz (+/-3 dB in bi-amp mode, 30 Hz -10 dB range), covering the foundation of virtually any live program material. A switchable passive/bi-amp mode adds system-design flexibility, twin NL4 speakON-compatible connectors simplify wiring, and a 35 mm pole socket lets a full-range top sit directly above it. The birch plywood enclosure wears a tough textured paint finish with a steel grille and side handles, weighing 37.3 kg. Order the Delta X18B from Eclipse Sounds in Nairobi with fast nationwide delivery across Kenya. Key Features: - Passive bass-reflex subwoofer, 18" driver with 4" voice coil - 800 W continuous / 1600 W programme / 3200 W peak, 8 ohms - Max SPL 134 dB; response down to 38 Hz (+/-3 dB bi-amp) - Switchable passive/bi-amp mode - 2 x NL4 speakON-compatible inputs - Birch plywood cabinet, 35 mm pole socket, 37.3 kg