EVA-2151D has been designed exclusively for fixed installation applications. The dual DVX-3159A 15-inch woofers are specially designed for subwoofer duty to provide reliable low-frequency performance with solid impact and low distortion at high sound pressure levels. The enclosure is constructed of 18mm 13-ply birch plywood reinforced with internal steel rigging top to bottom and coated with EVCoat for durability and professional appearance. PI versions are available for indirect outdoor exposure. PI versions include the CDG dual gland nut input panel cover and stainless steel three-layer grille. The innovative input panel provides a choice of Phoenix/EuroBlock connectors, optional CDNL4 cover plate with dual NL4-type connectors, or the CSG single gland nut plate for use with cable. All external hardware is stainless steel. Intermodule tie plates are included with each EVA-2151D to facilitate rigging to either EVA full range modules or another EVA-2151D suspended underneath. Enclosure side panel covers conceal all suspension hardware and provide a smooth, monolithic appearance.