The Extreme models of the Sonance "Visual Performance" speaker series were specially developed for outdoor, bathroom, wellness and sauna applications. Where the humidity is constantly very high, the speakers should not rust and should retain their sound properties for a long time. . Due to its dimensional stability at extreme temperatures (-34°C to +79°C) and long-term stability, the "Extreme" series is suitable for marine applications. The improved holding mechanisms ensure that the grille is held even more firmly on the loudspeaker.