Extremely powerful and compact double 15" 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 Impedance: 4 Ohm Power: 3120 Waes / 2400 Wrms (recommended amplifier: 2400 Wrms) Low frequency limit : 30 Hz (-10dB) Sensitivity SPL (1w/1m) : 101 dB Continuous SPL (1m) : 135 dB Maximum SPL @ 1m (peak level using pink noise, 10dB crest factor) : 145 dB Dimensions (cm) : 80x80x54 Weight (kg) : 60