EF5 Twister 3.1 is a passive 3-way horn-loaded system with an extended lowfrequency direct emission component. Professional HI-PRO two-way audio system with horn-loaded speaker technology, designed to seamlessly integrate with dedicated transducers, built from high resistance composite materials for elevated sensitivity, dynamics, and definition. Wide-angle coverage of a highly controlled sound field, and the ability to reach high sound levels without perceptible distortion. The system is characterized by excellent sound quality the ability to reach high-pressure ranges. A pair of large full-frontal horns manage the high-mid frequency range through a dedicated passive crossover(or using a 2 ch amplifier+DSP). The high-range horn is characterized by a special high-end derivation design. The long and complex development with variable sections allows a wide dispersion with powerful loading. The Shockwave 2.1 mid-range horn has a unique design that creates an extraordinary level of efficiency and sensitivity. This allows for excellent dynamics that distinguish the entire system from the very first listen. The extended low-frequency direct emission component is characterized by a light structure with a highly resistant ovoid shell, containing a 15 "woofer with a 30-400 Hz range and high sensitivity. This component can alone cover the mid and low frequencies or can be assisted by additional subwoofers to cover the lower frequencies with additional power. The LF driver features a water-resistant cone. Components such as the speakers, woofers, and compression drivers all represent world-class quality, without commercial or technological compromises. Thanks to its elevated sensitivity, the system requires limited amplification power. The EF5 Twister system is manageable through biamplification with DSP for managing cuts between the hIgh-mid and low routes. The two high-mid horn components are managed passively by a specific crossover filter. A Full-Fat audio FFA 8004 is the recommended 4 channel amplifier partnered in this system (stereo configuration) with a dedicated DSP. Otherwise, it can be managed actively by three amplifiers and by traditional DSP. Any additional subwoofers are sold separately.