6.5-inch (165mm) 2-way Bookshelf Loudspeaker. Designed and engineered in JBL’s world-famous acoustic engineering facility in Northridge, California, the HDI-1600 delivers exceptional performance from a compact enclosure. This bookshelf loudspeaker features a 2-way design with patented High-Definition Imaging (HDI™) waveguide technology, the patented 2410H-2 1-inch (25mm) compression driver, and a 6.5-inch (165mm) Advanced Aluminum Matrix cone woofer for powerful dynamics and incredibly accurate sound reproduction. The HDI-1600 enclosure is heavily braced to provide a solid acoustic foundation, and incorporates a bass reflex design with dual rear-firing, computer-optimized flared ports. The sophisticated curved cabinet features a modern design finished in a choice of automotive-grade painted High Gloss Black, or furniture-grade satin Walnut or Gray Oak wood veneers. A black cloth, magnetically attached grille completes the luxurious appearance.