18-inch, cast aluminium chassis, ferrite magnet subwoofer

Features

• Airflow vented magnet assembly for dynamic heat dispersion
• Twin demodulation rings
• Longer coil for greater control at high excursion
• Optimised double suspension
• Nominal diameter : 457mm / 18in
• Power rating : 1600W
• Continuous power rating : 3200W
• Rated impedance : 8?
• Sensitivity : 97dB
• Frequency range : 25-1500Hz
• Chassis type : Cast aluminium
• Magnet type : Ferrite
• Voice coil diameter : 125mm / 5in
• Voice coil material : Round copper
• Former material : Glass fibre
• Cone material : Carbon and kevlar loaded paper
• Surround material : Cloth-sealed
• Suspension : Double
• Gap height (Hg) : 12mm / 0.47in
• VC winding height (Hvc) : 30mm / 1.18in
• Additional impedances : 4O

Parameters

• Sd : 1134.12cm2 / 175.79in2
• Fs : 34.50Hz
• Qms : 4.573
• Qes : 0.332
• Qts : 0.309
• Re : 6.13?
• Vas : 145.81l / 5.15ft3
• BI : 32.59Tm
• Cms : 0.08mm/N
• Le (at 1kHz) : 1.87mH
• Xmax : 12mm / 0.47in

Mounting Information

• Overall diameter : 462mm / 18.19in
• Overall depth : 233mm / 9.2in
• Cut-out diameter : 416mm / 16.38in
• Mounting hole dimensions : 11x7mm / 0.43x0.28in
• Number of mounting holes : 8
• Mounting hole PCD : 432-441mm / 17.0-17.36in
• Power rating : Tested for two hours using a continuous, band-limited pink noise signal as per AES standard. Power calculated on minimum impedance. Loudspeaker tested in free air.
• Continuous power rating : Defined as 3dB greater than the AES rating.
• Sensitivity : Measured on axis at 1W, 1m in 2p anechoic environment.
• Parameters : Measured after unit subjected to pre-conditioning signal.
• Xmax : 0.5(Hvc-Hg) + 0.25Hg