3 inch

Specifications3-1/2" (88mm) extreme-performance midrange speakerPlus One™ woofer conePower Handling: 75 RMS, 300W peakSensitivity (@ 2.83V): 88dBFrequency Response: 150Hz – 10KHzVoice Coil Diameter: 1" (25mm)Impedance: 3.5 ohmsWhat happens when leading audio engineers with world-class resources ..

Audio SpecificationsFrequency Response: 90Hz – 21kHzNominal Impedance: 2.3 ohmsPower Handling (Peak): 75 WattsContinous Power Handling (RMS): 25 WattsSensitivity: 89dBPlus One™ Woofer ConesHarman’s patented (US patent # 7,548,631) Plus One™ polypropylene cones provide more overall speaker-cone area ..