The Mackie Thump18S is a robust, portable powered subwoofer featuring an 18" custom high-output woofer and 1200 watts of power, ensuring substantial bass output. It includes a built-in crossover at 140 Hz, stereo high-pass, and full-range outputs, facilitating easy connection to other speakers and subwoofers without extra hardware. The subwoofer employs efficient Class-D amplification and a dynamic bass response, providing clear and strong low-end sounds at all volumes. Its 1200 watt power makes it an ideal match for Thump series speakers, enhancing low-frequency performance at various events. The Thump18S's professional band-pass design ensures high-output and deep, rich bass that envelops any room.