Designed and developed in France, the Sub 10 Dual benefits from Focal's renowned savoir-faire. With its 25cm polypropylene cone, this subwoofer provides an excellent bass boost for any on-board audio system. Its dual-coil architecture offers the option to fit in parallel with a 2-Ohm operation, allowing the amplifier's maximum power to be exploited. Butyl Surround - Superior Resistance 2 x 4 Ohms Dual Voice Coil - High SPL Capacity Steel Chassis - Rigid and Compact Spider Compression - Voice Coil Ventilation Push Terminals - Simple and Reliable Connection Polypropylene Cone - Offering high rigidity that reduces distortion at extreme volumes. Specifications - • Type: For Sealed and Bass-Reflex Enclosure • Diameter: 25cm • Cone: Polypropylene • Magnet: Ferrite • Surround: Butyl • Max. Power: 500W • Nominal Power: 250W RMS • Sensitivity (2.83V/1m) 85dB • Impedance: 4 Ohms + 4 Ohms