Sound Reinforcement - Low Frequency Driver The 1505DT is an 8 ohm, 15" Black Widow/Super Structure speaker with a curvilinear cone for extended bandwidth. Offering a rare combination of usable frequency response into the mid-range with a smooth powerful low end, the 1505DT, Kevlar cone and long voice coil provide excellent linearity at high drive levels. Excellent as a woofer in multi-way enclosures or as the bottom end in a two-way system. Impedance: 8 Ohms Power capacity: 1400 W Peak 700 W Program 350 W Continuous Sensitivity: 99.0 dB / 1 W 1 m Usable freq. range: 40 Hz ~ 2 kHz Cone: Kevlar® impregnated cellulose Voice coil diameter: 4.0" / 100 mm Voice coil material: Aluminum ribbon wire Polyimide-impregnated fiberglass former Nomex® stiffener Solderless diffusion welded OFHC copper leads Net weight lb. / kg: 17 lbs.