CT Sounds Meso 25mm Flush Mount Silk Dome Tweeters Silk dome Voice coil suspended in fluid n38h neodymium motor Aluminum housing Frequency response 1.5Khz - 21Khz 2 x Meso 25mm Silk Dome Tweeters 2 x Tweeter connecting wires 2 x ABS crossover box Tweeter mounting pods CCA (Copper Clad Aluminium) wires provided Tweeter voice coil suspended in ferro-fluid Neodymium magnet for thrusting the high frequencies CNC Aluminium body CNC Aluminium face grille with laser cut logo ABS crossover boxes have logo printed on top Tweeter size: 25mm / 1&#034; Tweeter type: Silk-dome Mount type: Flush mount Rated power per tweeter: <span class="a-text-bold">25W (RMS) | 50W (MAX)</span> Rated power per tweeter pair: <span class="a-text-bold">50W (RMS) | 100W (MAX)</span> Rated impedance: 4 (Ohms) Sweep voltage: 2.8V Output SPL (@1w/1m): 90dB Frequency response (@SPL -10dB): 1.5kHz ~ 21kHz Resonant frequency: 2kHz Magnet type: N38H Neodymium Crossover circuit: 4F/100V Crossover point: 3.5kHz Filter for tweeter: 12dB Cutout diameter: 47mm / 1.85&#034; Outer diameter: 55mm / 2.17&#034; Mounting depth: 16mm / 0.63&#034;