Celestion : T5863: 18″ 1000W Speaker 8 OHM

18″ ferrite magnet cast aluminium chassis LF driver delivering 1000Wrms (AES Standard) power handling and 98dB sensitivity4″ high temperature dual layer Inside/Outside voice coil for higher efficiency preventing sensitivity loss through thermal compressionFEA optimized magnet assembly and suspension deliver highly symmetrical cone movement leading to exceptionally low harmonic distortionVented magnet assembly increases airflow to provide enhanced coolingTwin demodulation rings reduce flux modulation minimizing electromagnetic distortionDouble suspension and “multi-roll” surround provide exceptional linearity at extremes of cone excursionSPECIFICATIONS:Nominal diameter 457mm/18inPower rating 1000WrmsNominal impedance 8OSensitivity 98dBFrequency range 30-2500HzVoice coil diameter 100mm/4inChassis type Cast aluminiumMagnet type FerriteMagnet weight 3.18kg/112ozCoil material Round copperFormer material Glass fibreCone material Kevlar loaded paperSurround material Cloth-sealedSuspension DoubleXmax 10mm/0.39inGap depth 10mm/0.39inVoice coil winding width 30mm/1.18in