Features: Dual JBL low frequency drivers with a 64 mm (2.5 in) diameter edgewound ribbon voice coil which provides more crosssectional wire area in the voice coil gap than round wire designs, for greater efficiency and power handling.   JBL 2414H-C 25 mm (1 in) polymer diaphragm compression driver improves high frequency performance as well as system reliability. The advanced network topology crossover design shapes frequency response and delivers coherent summation in the crossover region.   High-voltage capacitors and inductors with massive cores and heavy gauge wire enable the crossover network to handle high power without saturating.    Progressive Transition⠞¢ high frequency waveguide provides superior coverage control, reduced distortion, and smoother frequency response. The rugged, acoustically superior enclosure is constructed from 19 mm (.75 in) MDF (Medium Density Fiberboard) using advanced adhesives and mechanical fastener technology for extreme durability and improved low-frequency performance. SonicGuard⠞¢ protects the highfrequency driver from excess power without interrupting the performance. Non-resonant, all-steel handles are used. Attractive 18-gauge hexagon perforated, steel grille protects components from damage. Specifications: Power Rating    :    500 W / 2000 W   Frequency Range (-10 dB)    :    42 Hz - 18 kHz    Frequency Response (±3 dB)    :    62 Hz - 13 kHz    Sensitivity (1w/1m)     :    100 dB SPL    Nominal Impedance     :    4 ohms   Recommended Amplifier Power    :    500 W to 1000 W into 4 ohms   Maximum SPL    :    133 dB   Nominal Dispersion    :    90º x 50º   Crossover Frequency    :    2.2 kHz   Dimensions (H x W x D) :(43 in x 18.3 in x 17 in)   Weight  :    94 lbs High Frequency Driver    :    JBL 2414H-C , 1" exit compression driver mounted on Progressive Transition⠞¢ Waveguide   Low Frequency Driver    :    JBL M115-8A x 2   Input Connectors    :    Neutrik® Speakon® NL-4 (x1); .25 in TS phone jack (x1); parallel   Grille : 18-gauge, powder-coated steel