Beyma Pro6mi 6.5-Inch 400 Watt Competition Series Midbass/midrange Car Speakers High power handling (100 W RMS). Excellent sensitivity (98 dB). Designed for medium frequencies reproduction. Peak RMS Each: 100 Watt. Peak Power Each: 200 Watt. Nominal diameter: 165 mm. / 6.5 in.. Nominal impedance: 4 ohms. Sensitivity: 98 dB 1w @ 1m. Frequency range: 150 - 8000 Hz. Voice coil diameter: 38.5 mm. / 1.5 in.. Bl factor: 6.5 N / A. Moving mass: 0.007 Kg. Thiele-Small Parameters: Resonant frequency, fs: 215 Hz. D.C. voice coil resistance, Re: 3.5 ohms. Mechanical quality factor, Qms: 8.1. Electrical quality factor, Qes: 0.81. Total quality factor, Qts: 0.74. Equivalent air volume to Cms, Vas: 2.1 l. Efficiency, Oo (%): 2.5. Effective surface area, Sd: 140 cm2. Voice coil inductance, Le @ 1kHz: 0.35 mH Integrated in the Competition line, these speakers have been developed from some of the most demanded models all over the planet by the Car Audio market in Beymas professional line. PRO 6MI has diameter of 6.5" and is capable of handling very high power: 100 Wrms. Thanks to the special design, optimized to reproduce the midrange frequency, the loudspeaker offers high sensitivity in all models that are around 100 dB.