The JBL's CONTROL 30 is the largest of JBL's indoor/outdoor control contractor-series speakers, designed for both interior and outdoor use. This passive speaker includes patent-pending cabinet manufacturing procedures, a high-quality 70V/100V line-distribution transformer, and a symmetrical mid/high-frequency horn that can be mounted vertically or horizontally. The WeatherMax multi-layer foam grille, which resists water intrusion, nickel-zinc rust-resistant terminals, a fibreglass and Kevlar composite woofer cone, a pure titanium high-frequency horn driver, and a pure butyl rubber cone surround all contribute to the speaker's weather protection. The Control 30 is also perfect for low-profile under-balcony installations due to its compact size and ease of installation using the InvisiBall install system. Vertical rotation of up to 37° off-axis and horizontal rotation of up to 44° off-axis are available with InvisiBall, and all changes are accomplished from behind the logo badge without removing the grille.