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1. | B&C; Speakers Speaker 21SW150 ManualSpecification LF Drivers LF Nd Drivers Coaxials HF Drivers Horns Nominal Diameter Nominal Impedance (1) Minimum Impedence Nominal Power Handling (2) Continuous Power Handling (3) Sensitivity (1W/1m) (4) Frequency Range Voice Coil Diameter Winding Material Former Material Winding Depth Magnetic Gap Depth Flux Density 530 (21) mm (in) 4 Ohm 4 Ohm 1500 W 3000 W 95 dB 30 - 1000 Hz 150 (6) mm (in) Copper Glass Fibre 30 (1.18) mm (in) 12 (1/2) mm (in) 1.2 T Thiele & Small Parameters Fs Re Qes Qm... Brands:B&C; | User Manual | ENGLISH | [View] | ||||||||||