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! Highlights Highly durable and extremely loud design built for the average to extreme audio systems. Glass fiber cone helps give higher sensitivity and produce overall more sound when on lower power. Two way design will bring a full range of frequencies to your ears and with great sound quality.  SPECIFICATIONS  Nominal Diameter 6.5†Nominal Impedance 4 ohm RMS Power Handling 80 Watts MAX Power Handling 240 Watts Sensitivity (1w/1m) 89dB Frequency Response 40Hz-20KHz Recommended HI Pass Crossover 60Hz Speaker Type 2-Way MOTOR  Voice Coil Diameter 1†/ 25.5mm Voice Coil Former Material KSV Winding Material EISV Cone Material Glass fiber Surround Material Rubber Basket Material Steel Magnet Material Barium Ferrite Magnet Weight 14.46 oz / 410g TWEETER  Nominal Diameter 1″ (25.4mm) Voice Coil Diameter 0.8″(ø20.4mm) Voice Coil Former Material KSV Winding Material EISVM Diaphragm Material PEI Magnet Material Neodymium Magnet Weight 0.3 oz / 8.5g Equivalent Volume 10.84L Excursion (one way) 2.7mm Free Air Resonance 64Hz Mechanical Factor 9.44 Electrical Factor 0.79 Total Factor 0.73 Mechanical Mass 13.72g Mechanical Compliance 444mm/N BL Factor 5.1 Voice Coil Inductance 228mH Cone Area 131cm2 DC Resistance 3.5 ohm Mechanical Mass w/o air 12g MEASUREMENTS  Overall Diameter 6.50†/ 165mm Overall Depth 2.83†/ 72mm Front Mount Baffle Cutout 5.55†/ 141mm Mounting Depth 2.36†/ 60mm Motor Diameter 3.70†/ 94mm