CELESTION TSQ2145 T6604 21 1800W 4.5 VC

This item is brand-new, factory sealed.

* Continuous power rating: 3600W * Sensitivity: 97dB * Voice coil diameter: 4.5-in * Nominal diameter: 530mm / 21-in * Power rating: 1800W * Continuous power rating: 3600W * Rated impedance: 4-ohms, 8-ohms * Sensitivity: 97dB * Frequency range: 30-1,000Hz * Chassis type: Cast aluminium * Magnet type: Neodymium * Voice coil diameter: 115mm / 4.5-in * Voice coil material: Round copper * Former material: Glass fibre * Cone material: Glass loaded cellulose, water-resistant coating front & back * Surround material: Triple roll, cloth sealed * Suspension: Dual, polysiloxane-laminated * Gap height (Hg): 12mm / 0.46-in * VC winding height (Hvc): 36mm / 1.42-in Parameters * Sd: 1661.9cm squared / 257.9-in squared * Fs: 30Hz * Mms: 435.2g / 15.35oz * Qms: 8.393 * Qes: 0.359 * Qts: 0.344 * Re: 5.0-ohms * Vas: 253.8l / 8.96ft cubed * BI: 33.8Tm * Cms: 0.065mm/N * Rms: 9.77kg/s * Le (at 1kHz): 3.91mH * Xmax: 15mm / 0.59-in * Xmech: 80mm / 1.57-in * Efficiency η 0 : 1.9% Mounting Information * Overall diameter: 541mm / 21.3-in * Overall depth: 250mm / 9.84-in * Cut-out diameter: 505mm / 19.88-in * Mounting hole dimensions: 8.5x10mm / 0.33x0.39-in * Number of mounting holes: 8 * Mounting hole PCD: 525-528mm / 20.61-20.79-in * Flange & gasket thickness: 17mm / 0.67-in * Unit weight: 13.8kg / 30.4lb Packed Dimensions & Weight * Single pack size W x D x H: 575mm x 575mm x 280mm / 22.6-in x 22.6-in x 11-in * Single pack weight: 14.5kg / 32lb Frequency response and impedance Force factor (Bl) symmetry Stiffness (K) symmetry Watch * Celestions Ten Squared Low Frequency Pro-Audio Driver Range and Our New UK Robotic Production Line * Ten Squared by Celestion: A New Range of High Performance, Low Frequency Loudspeakers [Each]