Titanium super tweeter; Die-cast aluminum frame; 1.5″ high-temperature Kapton(R) voice coil; 60oz magnet structure weight; Imp: 4ohm -8ohm ; Ferrofluid enhanced; Freq resp: 2kHz-25kHz; Single pack in gift box; Includes crossover capacitor; 1.5″ ; 400W max; 105dB sensitivity; 4″ dia; Mounting depth: 2.5″; Each;