... amplifier PA equipment used in conjunction, SummaryThe explosion-proof loudspeaker (explosion-proof loudspeaker) for flameproof horn loudspeaker, applicable ... explosion-proof symbol: Exd Ⅱ BT6, Exd Ⅱ CT62 of the rated power: 5VA, 10VA, 15VA, 25VA, 35VA3 frequency response: 250 ~ 7000Hz4 sound pressure ... nearer to use.2 dYH 3A is set pressure explosion-proof loudspeaker input, input 120V (or other value ...