Mackie - THUMP18S • High-performance active subwoofer • 18" • 600 (RMS), 1200 (peak) • max SPL: 130dB • Class D amplifier with Cool-running technology • Dual XLR subwoofer inputs • Outputs with HPF for satellites, full-range outputs for connecting additional subwoofers • Controls for volume and polarity • Dimensions: 702 x 427 x 394 (mm) • Weight: 15.1 kg Active speakers from Mackie are louder than ever. The Thump series delivers over twice the power of previous generations, with a compact portable design, proven quality, and unbeatable affordability. These speakers feature Class D digital amplifiers, built-in 3-band EQ with adjustable mids, and a completely new technology that allows them to produce very deep and impactful bass at any volume level. High flexibility makes these lightweight speakers with high-performance robust drivers ideal for the most demanding portable applications. The range includes the Thump12 (1000W), Thump15 (1000W), and the Thump18s subwoofer (1200W).