Summary: Type: subwoofer; The number of bands: 1; Power: 500 W (nominal), 1000 watts (maximum); Sensitivity: 95 dB; Housing: no; Additional information: Impedance 4 Ohm. Ferrite magnet. Gold-plated connectors. Cloth corrugated suspension of the diffuser. A special hole for ventilation of the coil. Aluminium die-cast as diffuser holder.; ...