Product parametersPro audio system LA20 waterproof line array speaker is with the high quality and the best timbre in the same volume of the speakers; Which composing with the Bullet HF, and Horn-loaded MF. Coupled with our patented invention of the diffusive and compressive LF. LA20 would be shown the excellent sound-pressure and the stability. Pro audio system line array speaker LA20 Type....................................large scale Three-way line array enclosure