Specifications Model ZRS6KM Size 6.5" Type 2-Way Midrange Component Kit RMS Power 75 Watts PEAK Power 150 Watts Frequency Response 250Hz - 22 kHz SPL @ 1w/1m 103dB Impedance 4 Ohm Mounting Depth 2.75" (7cm) Features • 6.5" Kevlar Reinforced Pulp Paper Cone • High SPL Midrange Drivers • Laminated Cloth Accordion Surround • 1.25" CCAR Voice Coil with Bullet Phase Plug • 14k Gold Plated Speaker Terminals • 1" Silk Dome Tweeter with Neodymium Magnet • Ferro-Fluid Enhanced Voice Coil Cooling • Impedance Matching 12dB Two-Way Crossover Network • Includes Tweeter Flush and Surface Mounts • Complete with Grills and Hardware