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 with minimal distortion.88 Db Sensitivity - High sensitivity ensures louder output with less power. Get more volume.easy Installation - Standard 12-inch size and terminal compatibility make this woofer speaker quick. Woofer Technical Specification:Speaker Type: WooferWoofer Size: 12 InchRMS: 200WPeak Power: 400WVoice Coil Size: 62MM (2.5"""")Voice Coil Material: ASVVoice Coil Impedance: 4 OhmsVoice Coil Layers: 2Magnet Size: 50 OzFrequency range: 40-2.5KHZCone material: PolypropyleneSensitivity: 88dBWoofer The Small ParameterBl - 13.03Fs - 36.1Re - 3.6Sd - 5.03E-02Cms - 0.1502Mms - 129.38Qes - 0.623Qms - 2.719Qts - 0.5065Vas - 53.01Sensitivity - 88.051Package Information:1x Woofer