The Control 28 is one of the largest of JBL's indoor/outdoor Control Contractor Series speakers. Ideal for theme park, health clubs, under balcony, parks and restaurants, the Control 28 is easily mounted and highly theft deterrent due to the unique InvisiBall mounting. InvisiBall adds the benefit of vertical rotation of up to 37° off-axis and horizontal rotation of up to 44° off-axis and all adjustments are made from behind the logo badge without having to remove the grill.Weather resistance is maximized using zinc plated grills to resist rust, a polycarbonate tweeter reinforced with a thin film of titanium for added rigidity and protection against the sun, wind, rain and dust, using WeatherEdge, a seamless, rubberized extension of the woofer adding protection to critical transducer elements.