The Infinity Alpha 403F is a 100 mm coaxial car speaker that enhances audio performance in vehicles with reliable sound reproduction. With a nominal power of 40 W RMS and a peak power of 320 W, this speaker delivers balanced sound across a frequency range of 80 Hz to 20 kHz. The Plus One woofer technology features a larger cone area than standard woofers in this size class, allowing for improved air displacement for deeper bass and warmer mids. A balanced PEI dome tweeter ensures clear, detailed high-frequency reproduction without distortion, making it suitable for various music genres from acoustic to electronic. With 88 dB sensitivity and 4 ohm impedance, the speaker offers efficient power usage while maintaining sound clarity. The universal mounting design facilitates easy installation in most vehicle types, including compact cars, sedans, and vans. Built for durability, the Infinity Alpha 403F undergoes extensive reliability testing to ensure consistent performance over extended use. The compact dimensions of the speaker make it compatible with standard 100 mm mounting positions while delivering enhanced audio output. Available in black, this coaxial speaker provides an upgrade option for factory audio systems seeking improved sound quality without complex modifications. The package includes two coaxial speakers, mounting screws, cable connectors, foam sealing rings, and a brief user manual for installation assistance.