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Whelen CenCom Other sirens have [COM] [100] [200] terminals. This has only two wires. One speaker is 11 ohms impedance. Two in parallel create 5.5 ohms impedance. Does Whelen detect 11 ohms and reduces power to 100 watts? If 5.5 ohms the amplifier produces 200 Watts? Or is their output really...

How can compact siren speakers project as far as reentrant exponentiahorn speakers whose sound path is much more gradual in diameter and longer? Does the gradually-increasing sound path diameter couple the sound energy to air better? Has anyone done tests to measure the dB output from different...

Way off in the distance, their Q2 siren was still at high rpms when it instantly went silent. What did the apparatus run into which crushed the siren and jammed the rotor? It was an eQ2 siren switched off. (At that time I did not know an eQ2 existed.)

If not too difficult, I'd like to create a small hand-held box on the end of a cable so passenger seat occupant can hold the box and switch the 480K to different sounds as though turning the 480k head's rotary switch. MANUAL - WAIL - YELP - HILO Or is that 3(?)-level rotary switch custom...