Parameters Model No.: GGL18 18inch Low frequency speaker Stamped steel basket Paper cone with cloth surround High efficiency 120Oz Magnet 4" (100mm) Hi-temp voice coil Nomal Impedance: 8Ohm SPL 98dB/W/M RMS/Musical/Max.Power: 600W/1200W/2400W 10",12" and 15" will be available     Specifications Unpressed on-paper cone for smooth frequency response 2.5” aluminium voice coil for high efficiency and power handling Barium ferrite magnet for maximum energy transfer Rubber suspension for deep frequency response Extended vented pole piece Designed for small sealed and vented enclosures