The Turbosound TSB-110 is a passive 10-inch subwoofer designed and engineered in the United Kingdom to extend the low-frequency response of portable and small-install PA systems. A single high-excursion 10-inch driver in a tuned front-loaded reflex enclosure delivers the low-mid foundation required to complement a paired mid-high cabinet, with a 35 mm M20 pole socket on the top panel for direct stacking of a top box above the sub. Constructed in 15 mm birch ply with reinforced internal bracing, a powder-coated perforated steel grille and recessed handles for two-person transport, the cabinet is engineered for repeated load-in cycles on hire inventories and modest permanent installations. Drive is via dual NL4 connectors (input and parallel link) from an external amplifier, so the system engineer can specify the crossover frequency, limiter and headroom externally, pair the TSB-110 with the venue's amplifier rack and DSP chain, and run multiple subs from a single channel pair. The compact footprint and modest weight allow single-operator setup for owner-operator rigs and corporate AV, while the 10-inch driver complement places the cabinet in the low-mid extension band rather than the deep-sub band — a practical low-frequency reinforcement for speech, background music and small-format live music in restaurants, function rooms and worship venues.