Two-piece subwoofer with level stability High quality construction for commercial use Equipped with: 2 x 18" - Bass reflex Rated power: 1600 W AES (maximum power 3200 W) SPL: 100 dB, maximum 136 dB. Resistance: 4 Ohm Frequency range: 34 Hz - 150 Hz Without low pass filter. The price is for two pieces and they are very loud 6945337411