GREENHEAD 18S is an active subwoofer featuring a 1600 W Class D Power Amplifier and is equipped with a 18” transducer. The system delivers outstanding sound pressure levels (up to 129dB) in spite of its compact housing, while providing a clean, impressively precise low-end reproduction. Its outstanding audio performance allow user to build most of the PA systems with 1 single sub and 2 full range speakers, 2 GREENHEAD15 for example, avoiding any external processing or crossover thanks to a balanced Xover signal to left and right speakers. The series comes with a full grille design in a lightweight (33.2kg) wood cabinet strengthened with a hardwearing, scratch-resistant black covering. Side handles enhance portability. The design of the top side eases subs stacking for larger systems and features a M20 pole mount thread to stack full-range speakers.