Reference 407F

The Infinity Reference REF407F is a high-performance 4-inch, 2-way coaxial car speaker designed to replace and upgrade factory systems. It features patented Plus One™ polypropylene woofer cones that expand the cone’s surface area for enhanced bass and punchier mid-tones. Smooth, clear high frequencies are handled by a 1/2-inch textile balanced-dome tweeter. Built with True Four Ohm Impedance technology, its 3-ohm architecture safely combines with factory wiring to extract maximum power efficiently from virtually any car stereo. It handles 35W RMS (105W peak) with a 92dB sensitivity, delivering accurate, vivid sound without requiring massive external amplification.