I buy such a siren, and today it has been deliver to me from Japan. Now I am try to recognize and learn all functions 🙂 This video is more helpfull for me 👍
Whelen sounds clearer but we do have to understand that this comparison is purely for fun. Japanese sirens are often rated for 8 to 16ohm speakers while USA sirens are rated for 11ohm speakers. Prolonged use of systems with mismatched impedances will greatly reduce the lifespans of both the amplifier and the speakers.