3.5" Square Piezo Horn Tweeter Frequency Response: 3.5KHz-25KHZ SPL: 93dB @ 1W/1M Excellent Transient Response Low Distortion Typical Impedance Appears as. 12 UF Capacitor Light Weight Higly Reliable 200 Watts RMS/400 Watts Peak Complete Pair In Gift Box Suited 4-8 Ohm Impedance Aplications A 30 Ohm Series Resistor is Recommended to Assure Stability of Extended Range Amplifiers Preclude Hazard of Amplifier Burn-Out Overall Dimensions: 3.5" x 3.5" Cutout Dimensions: 2.75 x 2.75" Screw Holes: 2.8"