Celestion TF1830 500W 4ohm LF Ferrite

Celestion - TF1830 500W 4ohm - LF Pressed Steel Chassis Loudspeaker - FerriteFeatures- Balanced Airflow Venting provides enhanced cooling- Multi-layer voice coil- Compact, high flux, Dual Magnet Motor designGeneral SpecificationsNominal diameter: 457mm/18inPower rating(1): 500WrmsContinuous power rating(2): 1000WEIA power rating(3): 650WNominal impedance: 4ohmSensitivity(4): 96dBFrequency range: 35-1,000HzVoice coil diameter: 75mm/3inChassis type: Pressed SteelMagnet type: FerriteMagnet weight: 1.8kg/65ozCoil material: Round copperFormer material: Glass fibreCone material: Glass loaded paper with weather resistant impregnationSurround material: Cloth sealedSuspension: SingleXmax(5): 4.5mm/0.18inGap depth: 8mm/0.31inVoice coil winding width: 17mm/0.67inSmall Signal ParametersD: 379.5mm/14.9inFs: 35.7HzMms: 179.11g/6.32ozQms: 4.213Qes: 0.434Qts: 0.393Re: 2.58ohmVas: 202.4l/7.15ft3BI: 15.46TmCms: 0.11mm/NRms: 9.63kg/sLe (at 1kHz): 1.28mHMounting InformationOverall diameter: 460mm/18.1inOverall depth: 209mm/8.22inCut-out diameter: 421mm/16.57inMounting slot dimensions: ø.8.3mm/0.32inNumber of mounting slots: 8Mounting PCD range: 443.4mm/17.46inUnit weight: 7.5kg/16.5lbNote(1)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.(2)Continuous Power Rating is defined as 3dB greater than the AES rating(3)Tested as per the EIA-426-A standard(4)Measured on axis at 1W, 1m in 2pi anechoic environment.(5)Xmax derived from: (voice coil winding width-gap depth)/2.(6)Small signal parameters measured after unit subjected to pre-conditioning signal.