Diameter: 3″ (7.6 cm) Diaphragm: titanium. Coil diameter: 1″ (25.4 mm) Resistance: 4Ω Rated power: 91w Maximum power: 151w Frequency range: 2800Hz-22000Hz Magnet: neodymium (N42) Sensitivity: 103 db Set: 2 pcs. Price per set.