DS18 EXL-TW2.5 Tweeter 1-inch Extremely Loud Series 100 Watts Max Silk Dome Ferrite Tweeter Ferro Fluid Sound Quality - Set of 2 (Black) HIGH EFFICIENCY & LOUD - They Are Loud And Clear, Even When Hooked Up To Your Factory Radio. 100 Watts Max - 50 Watts RMS COMPONENT SIZE - Mounting Depth 0.75-Inch. Cutout Diameter 2.07-in. LOW IMPEDANCE - 4-ohms - 1-Inch. ASV Coil Speakers Compensate For The Undersized Wires Found In Many of Today's Cars, And Make The Most of Every Watt Your Car Stereo Can Deliver MATERIAL & SIZE - 1" Inch Silk Dome For Lightweight, Shape-Retaining Properties, And High-Temperature Handling. Ferrite Magnet Made To Handle High Temperatures 80-250 C SPECS - Frequency Response 1.8K-20K Hz And a Sensitivity of 93.5dB