- Brand New Infinity 8" 1000 Watt Car Subwoofer - 1000 Watt MAX - 250 Watt RMS - Impedance: 4 Ohm - Single 2" Voice Coil - Large Roll Rubber Surrounds - High Efficiency Polypropylene Cone - Rubber Magnet Boot - Frequency Response: 30-400Hz - Sensitivity: 91dB - Product Condition: BRAND NEW - Part Number: REF860W Series: Reference Type: Subwoofers Cone Material: Polypropylene Surround Material: Rubber Voice Coil: Single Magnet Construction: Rubber Magnet Boot RMS Power: 250W Frequency Response: 30-400Hz