JL AUDIO (C2-075CT) 0.75-INCH (19MM) SILK SOFT-DOME TWEETER WITH NEODYMIUM MAGNET. 12DB/ OCTAVE INLINE FILTER INCLUDED- (SOLD AS A PAIR) FEATURES: 0.75-inch (19 mm) Silk Dome Tweeters The silk dome tweeter is prized by audiophiles for delivering realistic, non-fatiguing, high-frequency performance. The C2 component tweeters are built with 0.75-inch silk dome diaphragms that deliver powerful, extended response, on and off axis. Flush-mounting and surface-mounting fixtures are included to fit a wide variety of installation needs. Inline 12 dB / octave high-pass filters with tweeter protectors are included with this kit. The C2-075ct is designed to operate above 4 kHz with a minimum high-pass slope of 12 dB / octave. Sonic character: Clean and Powerful Sold as a pair. GENERAL SPECIFICATIONS: Continuous Power Handling (RMS) : 60 W Recommended Amplifier Power (RMS) : 25 - 100 W / Ch. System Efficiency : 91.0dB @ 1 W / 1 m System Nominal Impedance : 4 Ω System Frequency Response : 4 KHz - 22 KHz ± 3 dB TWEETER PHYSICAL SPECIFICATIONS: Flush Mount Fixture Diameter (A1) : 1.87 in / 48 mm Surface Mount Fixture Diameter (A2) : 1.69 in / 43 mm Flush Mount Mounting Hole Diameter (B) : 1.625 in / 41 mm Flush Mount Mounting Depth (C) : 0.76 in / 19 mm Flush Mount Tweeter Frontal Protrusion (D1) : 0.29 in / 7 mm Surface Mount Tweeter Frontal Protrusion (D2) : 0.92 in / 23 mm In-Store Purchase only SKU # 99610