JBL ES80CH 4-Way DUAL 6" Tower Floorstanding Speaker - Cherry (Discontinued by Manufacturer) Utilize UHF drivers cable of 40Hz for excellent highs. A JBL computer-optimized bass-reflex port provides deeper bass and less turbulence. These speakers are designed to look good anywhere with a style that equals their substance. The JBL ES Series uses cellulose-fiber cones reinforced with a ploymer coating for uniform pistonic motion: this eliminates internal resonances, without increasing cone mass. This means tighter, more precise imaging over a wider listening area.