F series cabinet looses waterproof black emery wear-resisting lacquers, by 18mm thick composed, cabinet dock-green splint by 1.5 mm thick metal ahead of protection, and iron network equipped with standard bracket jacks and ergonomic handle, make handling and installation, cabinet appears easily is equipped with 12 M8 lifting bolts, ensure the safety and lifting can adjust arbitrarily speakers hoisting position. Asymmetric cabinet design can make F series against send, make stage by internal unit is time aging experiment, with separate frequency network electronic protection circuit, can guarantee the speaker in poor conditions to long time relaxing stable job.