I have a single piezo horn in my system that I need to replace with 3 horns ( swim event starting horn ).
The existing horn spec is :
Impedance 1000 ohm @ 1 kHz
Voltage Nominal 15 V
Voltage Peak 35 V
Frequence Response 3 kHz - 30 kHz
Sensitivity 1W,1m 92 dB
and I am driving it with the attached circuit.
The tone and volume is perfect, but I need to replace this with 3 horns that I can position along the start line of the pool.
I have 3 other horns, but connecting these and testing gives a much lower volume - hardly audiable. The tone is correct, but the volume is way too low.
The only specs that the supplier can give me on the new horns is 75W.
I measured resistance over the terminals.
Old horn : no circuit over the terminals.
New horn : 4 ohms.
So what am I working with here ?
Is the old horn a piezo and the new horn a speaker ?
Any guidance on how to get the new horns working would be really appreciated.