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4" (10 CM) COAXIAL 2 - WAY SPEAKER
S-Series emphasize the line’s sound quality at an entry level. With many sizes availability, these make suitable for various types of vehicles.
The CFRP diaphragm (Carbon Fiber Reinforced Plastic) designed just right between hardness and lightweight position to clear up sound signal and deliver efficient performance.
The Alpine uniqueness technology H.A.M.R. (High Amplitude Multi-Roll) surround adapted from high end sound system X-Series increasing high output and superb sound quality.
The voice coin size has been updated into the larger one. The enhancement increases an ability of sound quality, making the sound become more resonant.