The RCF SUB9006 is one of the most powerful 2x18” subwoofers in the field of live sound. Featuring two high-power hyper-vented 18” neodymium woofers with 4.0” inside-outside voice coils and a 7200 watt digital amplifier, this cabinet delivers a serious amount of low frequencies. This sub is also remote controllable with RDNet and matched for ground stacking the HDL50 line array system above it.