The Turbosound TCS-B15B is a 15" front-loaded passive subwoofer engineered for fixed-install low-frequency reinforcement in clubs, houses of worship, retail spaces, and multi-purpose venues. As part of the Contractor Series, it is built to disappear into a system rather than dominate it — delivering articulate bass extension that complements the TCS-122 and TCS-152 full-range cabinets without muddying the mid-range.

Built for the installer

Designed and engineered in England, the cabinet uses braced birch plywood with a hard-wearing semi-matt black finish, ready to be flown or stacked in permanent locations. M10 fly points and the optional FP-2 flyplate kit make safe overhead deployment straightforward, and the protective steel mesh grille keeps the driver safe in trafficked rooms.

Where it fits

Pair with TCS-122 or TCS-152 tops via an external amplifier and crossover (recommended 80–100 Hz). The B15B brings the weight needed for live music in restaurants, fitness studios, and worship spaces where a passive, fit-and-forget LF solution is preferred over an active subwoofer.

Note: this model is no longer in production. Current Turbosound install subwoofers are listed under the iQ and iX install ranges.