Lot of 12 Adamson E119 Subwoofers from a fixed theatre installation, but the touring version. 

Adamson E119 Subwoofer: Powerful Single 19-Inch Sub
 

The Adamson E119 Subwoofer is a high-performance, single 19-inch cabinet engineered to perfectly complement the E-Series line array system, offering extended low-frequency coverage and impressive output in a relatively compact footprint.

At its core, the E119 features a single long-excursion 19" SD19 Kevlar Neodymium driver, utilizing Adamson's Advanced Cone Architecture and Symmetrical Drive Technology. This proprietary design ensures superior power handling, high linearity, and extremely clean, musical low-frequency reproduction down to 30 Hz. This makes it an ideal choice for high-end touring and installations where deep, controlled bass is essential.

The cabinet's integrated Autolock™ rigging system is crucial for touring applications, allowing the E119 to be flown seamlessly in the same array as the E12 or E15 cabinets, or deployed in ground-stack configurations. Its design also allows for easy cardioid setups thanks to dedicated front and rear connectors, drastically reducing unwanted bass energy on stage.