Kapton coil former Polyamide-imide coated copper voice coil Ferrite magnet Vented Pole Piece Pressed steel basket Paper cone Cloth accordion surround * Power Handling (RMS) 350 Watts Power Handling (max) 700 Watts Impedance 16 ohms * Frequency Response 71 to 3,700 Hz Sensitivity 98 dB 1W/1m Voice Coil Diameter 2.5" Magnet Weight 56 ounce