Pair (2pcs) 1200 Watts Titanium Compression Driver 2.0" Screw-On Horn Driver Tweeter 2.0" voice coil / 33oz. magnet 1200 Watts PMPO / Titanium dome Sensitivity: 100dB (W/M) / Frequency response: 800Hz - 18KHz Thread size: 1/ 0.375, Diameter: 34.2--34.3 mm, Impedance: 8ohm Pair (2pcs) of 2.0" Voice Coil Compression Driver