Technical specs and contents:

• 1 e/a 10” Cast Carbon Fiber Subwoofer
• Frequency response 10Hz-400Hz
• Power handling: 250WRMS (500Watt Pk).
• Impedance 4 Ohm
• Sensitivity: 87.3dB
• Mounting depth: 4.43”
• Cutout diameter:9.17”
• Cast frame: OD 10.28”
• Cone: Carbon Fiber
• Magnet weight: 40 Oz
• Cone surround: NB rubber
• Impedance: 2X2 Ohm
• Voice coil: 1.95” (49.55mm)
• Fs: 33.6Hz