Kepo piezo transducers 2048 3100 hz 96 16mm kepo kpm 1212a k6389 the kepo kpm 1212a k6389 piezo transducer 2400hz 12mm is energised by a 12vdc rated voltage and has a minimum spl of 90 95db12vdc2400hz10cm additionally equipped with a 2400hz resonant frequency and housed in black pbt casing suitable for use in professional commercial and industrial applications kepo kpm 1212a k6389 piezo transducer 2400 hz 12mm