The new improved SUBline incorporates Class D amplification, designed and made in Italy to FBT’s exacting standards, plus switchmode power supplies and DSP presets for accompanying full range enclosures. All models are road-ready with tour-grade birch plywood construction, integrated carrying handles and optional  wheels. In addition, in/out stereo connectors aid flexibility, facilitating the use of a single sub in left-right stereo setups.
Created with the aim to maximize SPL/SIZE ratio, they have Class D amplifiers, switch mode power supply and Digital Signal Processor with presets to match any other FBT speaker. 
With IN/OUT stereo connectors, it is possible to use only one subwoofer with Left and Right speakers Optional wheels, ergonomic integrated carrying handles and tourgrade plywood cabinets allow an easy transport