JBL ND 310 II 3-Way Dual 10" Floor-Standing Speaker (Black Ash) (Discontinued by Manufacturer) 3-way, dual, 10", floor-standing loudspeaker with MDF enclosure Maximum recommended amplifier power: 250 Watts High-frequency driver: 3/4" titanium-laminate dome with EOS waveguide Midrange driver: 4" PolyPlas cone; PolyPlas cone woofer features traditional JBL engineering Low-frequency driver: dual 10" PolyPlas cones; shielded components allow placement near video monitors