The TH118XL-I-EDM is a tapped horn subwoofer designed for both indoor and outdoor applications. It features a driver configuration that doubles output efficiency through its tapped horn design, enhancing low-frequency power delivery. The subwoofer supports high-power input and is capable of replacing two standard 2×18-inch front-loaded cabinets, thereby reducing the required physical footprint and amplifier count.

The cabinet includes interlocking skids on the top and bottom surfaces, enabling stable stacking. These skids are compatible with the SH96 and SH96HO models, facilitating secure multi-unit configurations for increased output.