Designed in the USA, the Avante Audio Imperio Pro IMP118 is a professional active subwoofer engineered for large events and pairs nicely with the Avante Imperio Pro IMP205 mini line array. With its powerful 18-inch high-power woofer, 4-inch voice coil and bass-reflex system design, this subwoofer delivers an exceptional frequency response of 32 Hz-130 Hz (-10dB) and 38 Hz-130 Hz (-3dB) that ensures deep-powerful bass that you can feel!