System SpecSystem Type: Self powered 18", bass-reflexMaximum SPL Output: 129 dB peakFrequency Range (-10 dB): 41 Hz - 130 HzFrequency Response (±3 dB): 50 Hz - 100 HzInput Connectors: Balanced XLR input with XLR loop through (stereo). 1/4 inchspeaker level input (Mono).Input Impedance: 20K Ohms (balanced)Signal indicators: Overload: Red LED indicates input overload conditionSignal: Green LED indicates signal presentPolarity: normal or reverse polarityCrossover Modes: analog 24 dB/Oct. filter slopeCrossover Frequency: 120 HzAmplifier Design: Crown® Class DSystem Power Rating: 600 WSpeakerLF Driver: 268G 460 mm (18 in) Differential Drive® dual voice-coil andmagnetic gap, neodymium wooferEnclosure: Rectangular, 18 mm, plywoodSuspension / Mounting: 36 mm pole socket on topTransport: 2 x injection molded handles with backing cupFinish: Obsidian DuraFlex™ finishGrille: Powder coated, Obsidian, 16 gauge perforated steel withacoustically transparent black cloth backing.Dimensions (H x W x D): 685.8 mm x 530.9 mm x 614.7 mm (27.0 in x 20.9 in x 24.2 in)Net Weight: 32 kg (70.5 lb)Gross Weight: 37.2 kg (82 lb)PRX618S17