View this product description in Norwegian.

Features:

•  18" ferrite woofer provides 1000Wrms power handling (AES Standard) and 97dB sensitivity
•  4" high temperature Inside/Outside voice coil efficiently dissipates heat,
• preventing sensitivity loss through thermal compression
•  FlexirolTM surround for greater excursion control
•  Double suspension for exceptional linearity at the highest excursions
•  Low frequency response, down to 30Hz
•  Smart chassis design minimises acoustic distortion
•  Specially treated, weather-resistant cone

General Specifications:

• Nominal diameter: 457mm/18in
• Power rating: 1000Wrms
• Nominal impedance: 8 Ohm
• Sensitivity: 97dB
• Frequency range: 30-2500Hz
• Voice coil diameter: 100mm/4in
• Chassis type: Cast Aluminium
• Magnet type: Ferrite
• Magnet weight: 3.1kg/110oz
• Coil material: Round copper
• Former material: Glass fibre
• Cone material: Glass loaded paper with weather resistant impregnation
• Surround material: Cloth-sealed
• Suspension: Double
• Xmax: 6mm/0.24in
• Gap depth: 10mm/0.39in
• Voice coil winding width: 22mm/0.87in

Small Signal Parameters:

• D: 0.38m/14.96in
• Fs: 26Hz
• Mms: 172.42g/6.08oz
• Mmd: 150.81g/5.32oz
• Qms: 4.33
• Qes: 0.29
• Qts: 0.27
• Re: 5.39 Ohm
• Vas: 395.56lt/13.96ft3
• Bl: 22.88Tm
• Cms: 0.22mm/N
• Rms: 6.506kg/s
• Le: (at 1kHz) 1.41mH

Mounting Information:

• Overall diameter: 462mm/18.19in
• Overall depth: 205mm/8.07in
• Cut-out diameter: 416mm/16.38in
• Mounting slot dimensions: 10mm x 7mm/0.39in x 0.27in
• Number of mounting slots: 8
• Mounting PCD range: 429-440mm/16.89-17.32in
• Unit weight: 9.8kg/21.6lb