... used in conjunction, SummaryThe explosion-proof loudspeaker (explosion-proof loudspeaker) for flameproof horn loudspeaker, applicable to the combustible and explosive ... type is a low resistance load explosion-proof loudspeaker, 5VA explosion-proof loudspeaker load impedance of 8 ohm; 10VA, 15VA, ... use.Wiring method, see below.3 explosion-proof loudspeaker with two bolts on a support.Explosion proof ...