The Turbosound TSP118B-AN is a self-powered 18" subwoofer built to anchor the low end of a Siena Series rig with authority. A long-excursion 18" ferrite LF transducer is driven by an on-board Class-D amplifier with KLARK TEKNIK DSP, and the system arrives factory-tuned with crossover, limiter and protection profiles matched to the cabinet — so the installer or system tech gets predictable, repeatable low end every time.

A bandpass-style enclosure delivers extended bass response with high efficiency, while front-panel filters and a polarity switch let engineers tune the sub-to-top crossover region without breaking out an external processor. Balanced XLR input and link-through outputs simplify daisy-chaining into stereo or LCR configurations.

M20 top-hat mounting accepts a standard distance pole for sub-on-top deployments. For mobile DJ, AV hire, house-of-worship and modest live applications looking for a properly engineered British powered sub, the TSP118B-AN is the Siena foundation piece.