DS18 SW12S4X 12" 1200W 4-Ohm Single Voice Coil Shallow Mount Subwoofer in Sealed Box DS18 12-Inch 1200W Max 600W RMS 4-Ohm Single Voice Coil Shallow Mount Subwoofer with Sealed Shallow Enclosure Sealed Enclosure Dimensions: 27.5" x 14" x 7" Frequency Response: 35-2.6KHz Mounting Depth: 3.7" Sensitivity: 90.6dB