Self-amplifying subwoofer in a wooden cabin with 18 ”woofer. Amplifier 500W RMS class D with limiter and integrated crossover 100Hz for direct driving of self-amplifying satellites. Frequency response 60-150Hz max SPL 124dB and integrated active stereo crossover. Frequency boost adjustment from 40Hz to 90Hz. Balanced XLR inputs, Link out with Balanced XLR, normal or boost setting to boost or not low frequencies & high cut. Weight 38kg in black color. It has a nest for a support base.