The PRO Samurai TS-W3820PRO subwoofer features:

• Rated power of 1800 W
• Dual voice coil with composite impedance of 2 + 2 ohms
• Wide stitched reinforced urethane enclosure for long cone travel
• 4-layer aluminum voice coil with copper winding
• Aluminum basket construction for better heat dissipation
• Large dual magnet for high power

Specifications:

• Size: 30 cm
• Type: Subwoofer
• Maximum power: 3500 W
• Continuous Power Output: 1800 W
• Frequency response: 20 Hz to 200 Hz
• Sensitivity: 88 dB
• Impedance: 1 Ω or 4 Ω
• Dual voice coil (DVC)
• Mounting depth: 154 mm
• Woofer cutout diameter: Ø352 mm
• Woofer material: Paper
• Surround: Urethane
• Spider: Polyester fiber
• Voice coil type: Long copper 4 layers
• Voice coil type: Aluminum
• Terminals: Push
• Magnets: Ferrite 38 cm / 15"
• Recommended enclosure: 57 (Sealed) / 90 (Ported)
• Recommended enclosure [ft 3]: 2.01 (Sealed) / 3.18 (Ported)
• Weight: 11.7 kg
• Dimensions: Ø405 x 216 mm
• Accessories: Subwoofer mounting screws
• Thiele/Small parameters Qts: 0.8
• Fs [Hz]: 27.1 Hz
• Vas [ft 3]: 2.69
• Vas [l]: 76.20
• Xmax [mm]: 22.8