RS1800A is an 18-inch active subwoofer featuring a 1000-watt Class-D amplifier and a heavy-duty, internally braced wood enclosure with epoxy finish. It provides a 18" woofer with a 4.5" voice coil, balanced XLR inputs, and balanced outputs (including a full-range path and high-pass option) with a variable crossover and phase switch for precise system alignment. The cabinet includes a 1 3/8" pole mount and delivers 47 Hz–118 Hz with up to 116 dB SPL, suitable for portable, fixed installations or mobile DJ setups.