Parameters Model No:SD-10 Type: subwoofer Number of ways:1 Diameter: 10 ”-250mm Products Frame:Steel Cone: Non-pressed Paper Sensitivity (1W1M): 87dB/m Nominal impedance:4/8 ohm RMS power handling:400W Model No:SD-12 Type: subwoofer Number of ways:1 Diameter: 12 ”-300mm Products Frame:Steel Cone: Non-pressed Paper Sensitivity (1W1M):88dB/m Nominal impedance:4/8 ohm RMS power handling:500W Model No:SD-15 Type: subwoofer Number of ways:1 Diameter: 15 ”-380mm Products Frame:Steel Cone: Non-pressed Paper Sensitivity (1W1M):89dB/m Nominal impedance:4/8 ohm RMS power handling:600W Specifications Unpressed on-paper cone for smooth frequency response 2” 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