Heat-resistant Design - The Asv voice coil and vented structure allow better airflow, preventing overheating during extended use.enhanced Bass Response - Engineered for maximum cone excursion, this woofer delivers deeper bass hits.86 Db Sensitivity - High sensitivity ensures louder output with less power.easy Installation - Standard 8 inch size and terminal compatibility make this woofer speaker quick to mount in most car.Woofer Technical Specification:Speaker Type: WooferWoofer Size: 8 InchRMS: 100WPeak Power: 200WVoice Coil Size: 39MM (1.5"")Voice Coil Material: ASVVoice Coil Impedance: 4 OhmsVoice Coil Layers: 2Magnet Size: 30 OzFrequency range: 55-5KHZCone material: PolypropyleneSensitivity: 86dBWoofer The Small ParameterBl - 9.33Fs - 55.66Re - 4Sd - 2.22E-02Cms - 0.169Mms - 48.368Qes - 0.7773Qms - 2.5092Qts - 0.5935Vas - 11.59Sensitivity - 86Package Information:1x Woofer