The LT-18A is a high-power single eighteen subwoofer with DSP active and passive capabilities. It has a compact exterior structure and strong power, making it suitable for occasions with high sound amplification requirements. Its dynamic effect is full and soft, with full low-frequency and strong surround feeling, which can stretch and expand its expressive power. Factory preset perfect parameters, equipped with professional customized aviation boxes, easy to transport and install, can be used with 2 LT-112A supports, or stacked with 4 LT-112A, or hung together with 8 LT-112A/LT-112.