The TLX215L-WHB is the dedicated flown subwoofer for the Liverpool Series line array, finished in white (WHB designation) for installations where the cabinet must blend with architectural ceilings or proscenium arches. Internally, two 15-inch long-excursion low-frequency drivers operate in a reflex-loaded enclosure tuned for high output, producing a frequency response of 35 Hz to 100 Hz and a maximum peak SPL of 140 dB per cabinet. Each driver carries a 4-inch high-temperature aluminium voice coil, a vented pole-piece for thermal stability under sustained drive and a triple-roll polyurethane surround for high mechanical excursion without compression. Onboard preset selection on the recommended amplifier allows the cabinet to operate as an omni-radiator or, when arrayed in pairs, as a cardioid subwoofer for reduced spill onto the stage. Construction is 18 mm Baltic birch with a polyurethane finish overpainted in the white WHB livery and a powder-coated white steel grille. The integrated rigging system is mechanically and dimensionally compatible with TLX84 hardware, allowing the cabinet to be flown at the top of a main array. Connectors are dual NL4 Speakon. Typical applications are house-of-worship, theatres, performing-arts venues and corporate AV in high-aesthetic spaces. Designed and engineered in the U.K.