Upgraded sound from a direct-fit 4" x 6" speaker automotive speaker. The Infinity® brand is known for a heritage dedicated to great sound reproduction. Whether it’s the lowest notes of a bass guitar, the wide bandwidth of a piano or the cymbal crash in the highest frequency ranges, the Infinity Reference X Series of automotive speakers has it covered. The REF-6402cfx is a 4" x 6", custom-fit, two-way, high-fidelity coaxial speaker with innovative features such as Plus One® (U.S. patent number 7,548,631 B2) polypropylene woofer cones, true 4-ohm technology, UniPivot™ edge-driven fabric soft-dome tweeters, an onboard passive crossover network and a tweeter level control that’s fully adjustable with the push of a button. The REF-6402cfx speakers are equally suited for head-unit or external-amplifier power because rigorous quality-control testing and voicing procedures ensure that they meet the tonal quality and power handling that you expect from Infinity products. Direct-replacement 4" x 6" sizing ensures a factory-quality fit. With a Reference X Series speaker available in virtually any factory size, every vehicle can experience the high fidelity and great value performance of these innovative automotive speakers. Listen to the Infinity Reference X Series speakers in person, then decide for yourself. Your car’s sound system will transform when upgrading to Infinity Reference X. You’re going to love these speakers.