Image Dynamics IDQ65CS 125W RMS 6.5" 2-Way iDQ Series Component Car Speaker System Size: 6.5" | Impedance: 4-Ohm | Power Handling: RMS Power: 125W RMS | Frequency Response: 55-25,000 Hz | Sensitivity: 85dB (1W/1m) | Mounting Depth: 1.95" Woofer Features: Fiber Matrix Paper Cone | Ultra Energy Neodymium Motor Assembly | Nomex Spiders with Progressive Roll Design | Parabolic Rubber Surround Composite Glass Fiber Non Resonant Basket | New Dynamic Cooling Technology (DCT) - for heat radiation | New Inline Phasing Technology (IPT) - for wider signal Imaging | Slim Design Yeilds - More excursion than traditional Speaker Crossover Features: Metalized Polypropylene Capacitors | Low Loss Air Core Inductors | Tweeter Attenuations Tweeter Features: 28mm Hand Coated Soft Silk Dome | Removable Face Plate and Grill Assembly | Aluminum Voice Coil Wire | Mounting Depth: 0.85"