DS18 12" Shallow Subwoofer Bass Packages 700 Watts with Built In Amplifier BOX SPECIFICATIONS Internal Volume 16L / 0.56ft3 Load Configuration Parallel In Box Type Sealed Box Box Material0.59" MDF Finish Material Non-Woven fabric (-3dB) Dropping Point45Hz MEASUREMENT Height14.96" / 380mm Width 19.3" / 490mm Depth 14.92" / 125mm Depth 27.4" / 188mm SPECIFICATIONS Speaker Size12" / 312mm Total Impedance 2 ohms RMS Power Handling 350W MAX Power Handling 700W Sensitivity (1w/1m) 87dB Frequency Response30-250Hz MOTOR Voice Coil Diameter 1.75" / 44.43mm Voice Coil Former Material Aluminum Winding Material EISV Cone Material IPP Surround Material Rubber Basket Material SPCC Magnet Material Ferrite Magnet Weight 50 Oz AMPLIFIER Amplifier Class Digital Amplifier Type Monoblock Subwoofer Number of Channels 1 CH Minimum Impedance 2 Ohms Signal to Noise Ratio 75 dB Efficiency @ 4 ohms 75% Total Harmonic Distortion (T.H.D) 0.30% Low Level Input Range 0.1-0.6 V High Level Input Range Yes Selectable X-Over LPF Fixed X-Over Filter Range 51 - 200 Hz Bass Boost Range0-6 dB Bass Boost Frequency 50Hz Phase Selector0-180° Led Indicator Power - Protection Power Input Terminal Size8 GA Fuse Size30 A Remote Level Control Yes Thermal Protection Yes (75°C / 167°F) Over-Load Protection Yes DC Output ProtectionYes Short Circuit Output ProtectionYes