Extremely powerful and compact double 18" subwoofer Designed, developed, and manufactured in Europe We replaced the typical iron-ferrite magnets by neodymium drivers for more power and to reduce the weight 1st choice Baltic birch plywood with scratch free black textured Polyurea finishing AES Power : 2400 Watt Impedance : 4 Ohm Low frequency limit : 25 Hz (-10dB) Sensitivity SPL (1w/1m) : 102 dB Continuous SPL (1m) : 136 dB Maximum SPL @ 1m (peak level using pink noise, 10dB crest factor) : 146 dB Dimensions (cm) : 118x80x56 Weight (kg) : 80