Product Description Warranty Information Reviews Lanzar OPTIBT38 Optidrive 400 Watt Heavy Duty Die Cast Aluminum Bullet Super Tweeter notpyleDie Cast Aluminum Super TweeterDie Cast Frame1.5'' High Temperature Kapton Voice CoilNeodymium Magnet Structure200 Watts RMS/400 Watts Rated Power4 Ohms ImpedanceFerro Fluid Enhanced Voice CoilSensitivity: 102dB (1w/1m)Frequency Response: 2.5k-20kHz4.52'' Diameter/2.73'' Mounting Depth 1 Year MFG Warranty