RI Audio 8" Midrange Speakers 4 Ohm Power Series RI-P8.4 4 Pack Harness the performance of the new Power Series Midrange Speakers from RI Audio. With ultimate production and value in mind, the creation of the power series was born. These 8" Midrange Speakers have an incredible true 250 Watt RMS power handling. Featuring an accordion style surround, 1.5" voice coil, and a 30 oz ferrite magnet, these speakers will give you the clarity and sound quality you deserve for any system you build. Specifications Hybrid spider with interlaced tinsel leads Tradition spade style terminals Stamped steel basket Non pressed paper cone Nominal Diameter: 8" 4 Ohm impedance Program power:250 Watts RMS Peak power handling: 500 Watts Max 1.5" Voice coil Frequency Response: 100-8000Khz Sensitivity: 95 Db Spl Voice coil wire: CCAW Former material: KSV 30 Oz Ferrite Magnet Mounting Depth: 3 1/4" Overall Mounting Depth: 3 5/8" Mounting Diameter: 7 1/8" Overall Diameter: 8 1/4" Magnet Diameter: 4 3/4" Thiele & Small Parameters Fs- 87 Re- 3.7 Qes- .653 Qms- 5.331 Qts- .528 Vas- 17.1 ft Sd- 216 cm2 Xmax- 4.5mm Mms- 12.8g Bl- 6.327 Le- .27 Mh *This listing is for Four RI Audio Midrange Speakers*