Bosch LBC 3472/00 Driver Unit, Horn driver 25W, for use with LBC3478/00 (14") or LBC3479/00 (20") horns, light gray RAL 7035, Rated power : 25/12.5/6.25 W, 121 dB / 107 dB (SPL), Effective Frequency Range (-10dB) : 550 Hz to 5 kHz.
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