Alpine's S-Series speakers feature rugged looks and tough, ultra-rigid cones. The SPS-100A 4" speakers will punch up your system's sound with crisp highs and mids. Its aluminum-coated polypropylene cone works with a durable rubber surround to give you the full mid-bass output you crave. A titanium-coated PEI dome tweeter produces sharp details across a wide dispersion pattern, for excellent "sweet spot" imaging. Grilles included.