DS18 ZXI-654 Car Audio Coaxial Speaker with Kevlar Cone 2 Way 180 Watts 4-Ohm (2 Speakers) DS18's ZXI line is both highly innovative and intuitive making it a very versatile audio line that will bring you loud and clear music on demand. This two-way 6.5 takes 80w RMS and 240 max watts and with a 89 DB sensitivity rating, you don't need a lot of power to bring these very loud speakers to extremely high volumes. These speakers are an amazing choice for your average every day to extreme audiophile! SPECIFICATIONSNominal Diameter 6.5N ominal Impedance 4 ohmRMS Power Handling 80 WattsMAX Power Handling 240 WattsSensitivity (1w/1m) 89dBFrequency Response 40Hz-20KHzRecommended HI Pass Crossover 60HzSpeaker Type 2-WayMOTORVoice Coil Diameter 1 / 25.5 mmVoice Coil Former Material KSVWinding Material EISVCone Material Glass fiberSurround Material RubberBasket Material SteelMagnet Material Barium FerriteMagnet Weight 14.46 oz / 410gTWEETERNominal Diameter 1" ( 25.4 mm)Voice Coil Diameter 0.8" ( 20.4 mm)Voice Coil Former Material KSVWinding Material EISVMDiaphragm Material PEIMagnet Material NeodymiumMagnet Weight 0.3 oz / 8.5 gEquivalent Volume 10.84LE xcursion (one way) 2.7 mmFree Air Resonance 64HzMechanical Factor 9.44E lectrical Factor 0.79T otal Factor 0.73M echanical Mass 13.72 gMechanical Compliance 444mm/NBL Factor 5.1V oice Coil Inductance 228mHCone Area 131cm2DC Resistance 3.5 ohmMechanical Mass w/o air 12g