ME-Series Speakers Pioneer ME-series speakers are protected from the effects of sun and water exposure, meeting both IPX7 and ASTM D4329 UV resistance standard ratings to achieve all-weather reliability. Mica Reinforced IMPP monocoque cone with butyl rubber surround, constructed using an advanced in-mold bonding technique for superior water resistance while maintaining high quality, powerful sound. The symmetrical motor design with high strength suspension is optimized to provide stability, linearity and clear, low distortion sound reproduction. Lightweight polymide (PI) tweeter diaphragm and uniquely shaped wave guide provides natural and clear vocals with wide dispersion. The TS-ME770TSB comes with a classic white grille design that cosmetically integrate seamlessly into marine interiors and cabin designs.