The SMS118 is a high-performance 18-inch subwoofer designed to complement Bose ShowMatch arrays. Featuring DeltaQ technology, it ensures precise low-frequency coverage and integrates seamlessly with mid/high modules for consistent tonal balance. Equipped with a Bose LF18 neodymium high-excursion driver, it delivers deep bass down to 29 Hz. The SMS118 includes 4-point quick-pin rigging for arrays up to 18 units, front and rear NL4 inputs for easy cardioid or reversed-box setups, a pole-cup adapter for flexible deployment, and removable side guards for both portable and permanent installations.