Description The FSX65-4 is a powerful 6.5-inch 4 Ohm pro audio mid-range loudspeaker. Featuring a vented back plate design for increase thermal cooling as well as a high temperature 1.5-inch copper voice coil this speaker is capable of operating at the loudest volumes very efficiently. When looking for a pro audio mid-range speaker the FSX series are the only practical solution. Single 4 Ohm voice coil. Peak Power Rating: 300 Watts. RMS Power Rating: 150 Watts. Sensitivity: 92.5 dB. Frequency Response: 100 Hz - 8 kHz. Sold Each. Specifications Skar Audio FSX65-4 150 Watt RMS 6.5 Pro Audio Speaker Single 4 Ohm Configuration 6.5 Midrange Component Speaker Sold Individually Magnet Type: Ferrite Magnet Weight: 20 Oz Voice Coil: 1.5 Copper Basket: Pressed Steel RMS Power: 150 Watts Max Power: 300 Watts Sensitivity: 92.5 dB Frequency Response: 100 Hz - 8 kHz Cone Material: High Quality Paper Dust Cap Material: Solid Composition Paper Mounting Specifications Depth: 2.6 Outside Diameter: 6.61 Cut-Out: 5.7 Magnet Diameter: 4.7.