The JBL VT4881A is a professional arrayable subwoofer designed specifically for very-low frequency (VLF) applications, suitable for use in music recording and sound reinforcement environments. This model features an 18-inch (200 mm) low-frequency driver and incorporates an active 3-way system. It offers selectable settings, including KickBack and RoomFeel functions, enabling a highly customizable sub-bass response to match varying acoustic spaces. Adjustments can also be made remotely using an optional IR wireless remote. The subwoofer is equipped with a self-cooling aluminum voice coil and a flux-efficient VAST magnet system, which provide dynamic bass performance while minimizing weight. The linear Xmax control ensures precise control over the speaker excursion, promoting accurate sound reproduction. Typically used in pairs or multiples, the VT4881A’s bass coverage can be optimized through JBL's ArrayCalc software, allowing for effective sound dispersion in diverse settings.