Power Acoustik XP-573K XP Series Speakers: * Black texture coat stamped steel frame * Chrome back plate * Polypropylene injection cone * Butyl rubber surround * The Full Range Speakers (Pair of Speakers) features a 3-ohm impedance * 1" silk midrange (694K) * 0.75" silk dome tweeters * 0.5" silk super tweeter (694K, 653K and 573K) * Configuration: 5" x 7", 3-way * Frequency Response: 65 - 20KHz * System Impedance: 3 ohm * Max Power Handling: 270W * RMS Power Handling: 135W * System Efficiency: 88 dB * Midbass Voice Coil: 1" aluminum * Midbass Magnet: 10 oz * Midbass Cone Material: Polypropylene * Top Mount Depth: 2.25" * Bottom Mount Depth: 2.625" * Cutout Dimension: 5" x 7"