3'' speaker made of metal for 70 / 100V lines with fire protection (fireproof dome sold separately). 9W of maximum power. Low loss transformer 6W, 3W @ 100V and 3W, 1,5W @ 70V. Frequency response: 180-20000Hz +/- 10dB, Sensitivity: 91 dB (1W 1m), Dimensions in mm (Diameter x depth) 181 x 129. Color: RAL 9003. Degree of protection IP 21 and Type A according to EN54-24 (including fire retardant dome LDACH42TNFDS01).