*
Nominal diameter: 457mm / 18-in*
Power rating: 1000
Watts RMS* Nominal impedance: 8
Ohms* Sensitivity: 97dB*
Frequency range: 30-2500Hz*
Voice coil diameter: 100mm / 4-in*
Chassis type: Cast
Aluminum* Magnet type: Ferrite*
Magnet weight: 3.1 kg / 110oz*
Coil material: Round copper*
Former material: Glass fiber*
Cone material: Glass loaded paper w / weather-resistant impregnation*
Surround material: Cloth-sealed*
Suspension: Double*
Xmax: 6mm / 0.24 -in18-in ferrite woofer provides 1000 Watts RMS power handling (AES Standard) & 97dB sensitivity 4-in high temperature Inside / Outside voice coil efficiently dissipates heat, preventing sensitivity loss through thermal compressionFlexirol (TM) surround for greater excursion control* Double suspension for exceptional linearity at the highest excursionsLow frequency response, down to 30HzSmart chassis design minimises acoustic distortionSpecially treated, weather-resistant cone [Single]