The Electro-Voice EVF-2151D is a high-power, front-loaded bass element that can be used in a variety of applications where high-quality sound reinforcement is required in a lightweight package. The EVF-2151D utilizes two DVX3159A 15" woofers, developed using FEA optimization for motor, suspension, and electrical design to ensure very low distortion and maximum intelligibility at high SPL. The EVF-2151D's features make it a professional loudspeaker for any fixed install application. The trapezoidal enclosure is constructed of weather-resistant birch, and coated with EVCoat™ for protection from the elements. For maximum protection against extreme outdoor elements, a fully-weatherized fiberglass version is available. The unique acoustic and rigging design allows for vertical and horizontal clusters to be built using any combination of loudspeakers from the entire EVF and EVH series. With an assortment of full-range, low-frequency, and subwoofer loudspeakers available, you have the tools to maximize flexibility of system design, no matter what the application or budget. The innovative input panel provides a choice of Phoenix style connector (included in all standard models) or the ability to add a dual NL4-type connector cover plate or gland-nut cover plate (for weatherizing applications). An externally accessible jumper selects passive or active operation. An available 70.7/100-V transformer kit may be easily mounted to the input panel for use in distributed systems. All these features give you the flexibility to address a large range of venues, quickly and precisely supporting customer requirements with fewer items in inventory.