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CASSA Celestion - TF1830 500W 4ohm - LF Pressed Steel Chassis Loudspeaker - Ferrite Altoparlante da 18" con chassis in acciaio stampato, magnete in ferrite, bobina da 3", potenza 500Watt, impedenza 4ohm Caratteristiche - Balanced Airflow Venting provides enhanced cooling - Multi-layer voice coil - Compact, high flux, Dual Magnet Motor design Specifiche Generali Nominal diameter: 457mm/18in Power rating(1): 500Wrms Continuous power rating(2): 1000W EIA power rating(3): 650W Nominal impedance: 4ohm Sensitivity(4): 96dB Frequency range: 35-1,000Hz Voice coil diameter: 75mm/3in Chassis type: Pressed Steel Magnet type: Ferrite Magnet weight: 1.8kg/65oz Coil material: Round copper Former material: Glass fibre Cone material: Glass loaded paper with weather resistant impregnation Surround material: Cloth sealed Suspension: Single Xmax(5): 4.5mm/0.18in Gap depth: 8mm/0.31in Voice coil winding width: 17mm/0.67in Parametri di Thiele-Small D: 379.5mm/14.9in Fs: 35.7Hz Mms: 179.11g/6.32oz Qms: 4.213 Qes: 0.434 Qts: 0.393 Re: 2.58ohm Vas: 202.4l/7.15ft3 BI: 15.46Tm Cms: 0.11mm/N Rms: 9.63kg/s Le (at 1kHz): 1.28mH Informazioni di Montaggio Overall diameter: 460mm/18.1in Overall depth: 209mm/8.22in Cut-out diameter: 421mm/16.57in Mounting slot dimensions: Ø8.3mm/0.32in Number of mounting slots: 8 Mounting PCD range: 443.4mm/17.46in Unit weight: 7.5kg/16.5lb Note (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.