product description: 
FA-15 is a built-in ladder divided two-way speaker designed for various flow or speech and music sound reinforcement applications where a fixed installation. FA-15 is a built-in precision technology applications two-way full-range speaker, a coil diameter of 3 inches (75mm) high-power low-frequency unit and a 3-inch (75mm) diaphragm compression tweeter, of which 15-inch high-power cell design a unique cooling device, effectively protect the unit and guarantee stability in the long large dynamic environment; HSI to treble horn 90 ° × 60 °, can be rotated according to the actual place. There are 17 cabinet M8 hanging points, easier to install and hanging a variety of ways, there is a box at the bottom of the support base 35mm. Case made of high quality high density 15mm birch plywood manufacture, and minimizes large dynamic state resonance box, built-in passive crossover mining HI-FI grade capacitors, inductors high-purity oxygen-free copper, laid a product quality a solid foundation, the surface of the black water-based environmentally friendly multi-layer waterproof fire-retardant paint, wiring board after two parallel Neutrik NL4MP socket, hexagonal steel mesh hole with a special sound-permeable mesh, to ensure the efficient transmission under conditions of sound, provides a more good protection unit.