- ElectroVoice ETX-18SP - Active subwoofer - 18" speaker - 1800 Watt class D amplifier - Integrated DSP and FIR filter - LCD control screen - Frequency response: 28 Hz to 150 Hz - Max. SPL power: 135 dB - 2 x XLR / jack combo inputs - 2 x XLR outputs - 35 mm socket for coupling tube - 2 handles on the sides - Construction: 18 mm Finnish birch - Removable transport wheels included - Metal grille - Dimensions: 550 x 675 x 777 mm (without wheels) - Dimensions: 550 x 675 x 910 mm (with wheels) - Weight: 51.8 kg