Power Acoustik NB-2 200-Watt, 3-Way Mount Tweeters: * Tweeter Size/Type: 1" piezo * Frequency Response: 5kHz-25kHz * Tweeter Impedance: 4 ohm * MAX Power Handling: 200W * RMS Power Handling: 100W * Tweeter Efficiency: 97 dB * Diaphram Material: Polypropylene * On-Board Crossover: 6dB * Mounting Options: flush/surface/angle * Tweeter Mounting Depth: 0.75" * Tweeter Cutout Diameter: 1.75"