VLA-21OSUB adopts the direct radiation phase inversion concept, utilizes computer software to predict and analyze the speaker resonance, enhances the structure to reduce the resonances, produces the low-frequency sound clean and more power- ful, also dismisses the sound staining from the cabinet. Optimized the design of the chamber makes the speaker size more compact. Long-stroke high-power bass driver conjoined with advanced DSP control technology to effectively correct the overload problem caused by high power distortion and other issues. VLA-21OSUB is recalled by the preset parameters of the DSP processor and can be conjoined with VLA-21O line vertical array system full-range series. Sound tuning & setup is simple and quick. The cabinet adopts high-strength 15mm “Baltic birch plywood”, tongue-and-groove jointing technology, thus making the cabinet strong and sturdy. There are carrying handles on both sides of the speaker, on the back of the speaker, the installation screw holes with pulleys are reserved, which is convenient for handling and moving. The cabinet surface treatment adopts the poly-urea spray paint process, strong, durable, and environmentally friendly, for better protection and abrasion resistance.

VLA-21OSUB frequency response can reach from 45Hz to 5OOHz, 18-inch Long-stroke high-power bass driver conjoined with advanced DSP control technology, 1OOdB (1Watt@1m) sensitivity, maximum sound pressure level output reaches 134dB.VLA-21OSUB is conjoined with VLA-21O, hanging with multi-grid hanging hardware (optional accessories) for roadshow or fixed installation, or placed on the ground to be a full-range system. VLA-21O system has plenty applications for church, house of worship, outdoor show performance, banquet halls, theaters， nightclubs etc.