The loudspeakers of LA Series if specially designed for using at outdoors or indoors with the purpose of audio amplifying featuers by long-throw box,cast frame wave-guided horn,and external crossover. The hi/mid/low loudspeaker is driven by power amplifier respectively.thetrapezoid cabinet with wrinkled texture effect is coated by antiabrasive waterproof black paint and alao lined by acousic black materied with thick-hole and foam blacked steel grille.The loudspeaker of LA Series is widely used in stadium.thame park,large conference room,etc.