JBL L830 3-Way High Performance 6-Inch Bookshelf Loudspeaker - Black (Pair) 1" pure titanium dome tweeter for exceptional high frequency performance 3/4" Mylar-dome, cast-frame chassis mounted in a bi-radial horn for better high frequency repsonse Aluminum waveguides provide better dispersion and a larger listening sweet spot Freeflow port technology delivers great sound and makes sure you get the lowest amount of distortion