LBC3474/00 50W
Bosch LBC 3474/00 Horn driver 50 W, for use with LBC3478/00 (14") or LBC3479/00 (20") horns, light gray RAL 7035, 50 / 25 / 12.5 W Rated Power, 127 dB / 110 dB (SPL), Effective frequency range (-10 dB) : 350 Hz to 4 kHz, Opening angle : at 1 kHz/4 kHz (-6 dB) : 60° / 28°.