The Extreme models of the Sonance "Visual Performance" loudspeaker series were specially developed for outdoor, bathroom, wellness and sauna applications. Where the humidity is constantly very high, the loudspeakers should not rust and should retain their sound properties for a long time. Due to their 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 cover grille is held even more firmly on the loudspeaker.