View this product description in Norwegian.

 Features:
15" ferrite woofer provides 1000Wrms (AES standard) power handling and a frequency response of 40Hz-2500Hz.  4" high temperature Inside/Outside voice coil efficiently dissipates heat, preventing sensitivity loss through thermal compression. Double suspension and a "multi-roll" surround provide exceptional linearity at extremes of cone excursion. Intelligent heat management in both chassis and magnet assembly design furtherminimizes distortion. Less than 10kg - very low weight for this product class
General Specifications:

• Nominal diameter: 381mm/15in
• Power rating: 1000Wrms
• Nominal impedance: 8 Ohm
• Sensitivity: 96dB
• Frequency range: 40-2500Hz
• 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:  8mm/0.33in
• Gap depth: 9.5mm/0.37in
• Voice coil winding width: 25mm/0.99in

Small Signal Parameters:

• D: 0.33m/12.99in
• Fs: 40.5Hz
• Mms: 153.53g/5.42oz
• Mmd: 139.38g/4.92oz
• Qms: 3.98
• Qes: 0.36
• Qts: 0.33
• Re: 5.10 Ohm
• Vas: 104.27lt/3.68ft3
• BI: 23.53Tm
• Cms: 0.10mm/N
• Rms: 9.81kg/s
• Le: (at 1kHz) 1.8mH

Mounting Information:

• Overall diameter: 385mm/15.16in
• Overall depth: 180mm/7.1in
• Cut-out diameter: 351mm/13.82in
• Mounting slot dimensions: 10mm x 7mm/0.39in x 0.27in
• Number of mounting slots: 8
• Mounting slot PCD range: 365-375mm/14.37-14.76in
• Unit weight: 9.7kg/21.3lbs