TRU SPEC Prefab Single 15" Sub Up Port Back Subwoofer Enclosure 2000 - 2006 162 mm/N ***Xmax=(Voice coil winding

162 mm/N ***Xmax=(Voice coil winding depth-Magnetic Gap depth)/2+ Mgnetic Gap Depth/4

4D is made to deliver 2 x 600 watts RMS @ 4-Ohms Bridge

The D2500Py is a compact solution for mid-high vocal reproduction that offers high sensitivity and a crystal clear natural sound from the Polyimide diaphragm

this subwoofer is designed to deliver hard-hitting lows and crisp performance

TRU SPEC Prefab Single 15" Sub Up Port Back Subwoofer Enclosure 2000 - 2006 162 mm/N ***Xmax=(Voice coil windingEvery Tru Spec enclosure is computer designed, CNC cut, and assembled inhouse at GPcarAudio. Tru Spec Prefabricated enclosures are simple, straight to the point, true to spec sub enclosures with proper airspace and non restrictive port area that allows you to have custom box performance at a reasonable price. TRU SPEC PREFAB single 15" Sub up port back Material: 0. 75" MDF Total woofer displacements factored in: 0. 24 cuft ) *What does this mean? You