Wharfedale Pro IMPACT-X18B Passive 18" Subwoofer 500 W, 133 dB

The IMPACT-X18B is a passive bass-reflex subwoofer with one 18" driver and a 2.5" voice coil, rated at 500 W continuous and 2000 W peak into 4 Ω. It reaches 133 dB maximum SPL at 1 m in half space, with a response of 45 Hz to 220 Hz (+/-3 dB). The MDF cabinet has two handles and a 35 mm pole…