
Given that their direct copies of American sirens run on either an engine of brushed DC motors the pitch of the sirens will vary, however their strictly AC-powered sirens run on either three-phase or a single-phase induction motor with capacitors. Those motors are RPM limited to the frequency of the incoming voltage. Since most places outside the US use 50 Hz AC two pole motors that these sirens typically run on will spin at roughly 2850 RPM vs 3500 RPM here in the states. With most of their sirens being 10 port that means they'll sound more like an overreved 8 port siren, usually around 480 Hz. Besides about half of Japan, a lot of places in Asia run 50 Hz, but the Philippines happens to be one of the exceptions to the general frequency standards and runs a 60 Hz grid. There happen to be a few companies in the country that actively sell Lion King sirens, and one of them runs a YouTube channel where they've posted a few videos of siren demos and installation jobs. Of course with the incoming voltage to the sirens being 60 Hz, they sound like any typical 10 port siren here in the states like a 14V or Siro Drone. So far I've found videos of their rather large LK-JDL550 siren, which from what I understand is the biggest that Lion King sells at the moment with a 10 HP motor, the LK-JDL400 which has a roughly 3 HP motor and comes in both single-phase and three-phase, and the LK-STH10A which has a roughly 5.5 HP motor. The LK-STH10A and LK-STH10H (T-121 lookalike) use the same core which is based on the LK-JDL480 albeit with a slightly different rotor design that gives them a slightly more "choppy" or raspy sound. The rotor is similar to the one found in the Screamer S-5/7.5 except for its 10 port instead of 9 and has straight but directional vanes instead of slanted ones. The RM-130 is basically an overreved Screamer, so with the LK-STH10A you'll notice that it has a very similar tonality to one. This is shared amongst the sirens that have the motor and intake for the siren chopper on opposite sides. The rotor that comes with the ones with them on the same sides have their center hubs protruding slightly above the height of the rotor with part of the vanes cast into them. If I had to guess that plus the motor's partial obstruction of the intake smooths out the airflow and gives them a more smooth sound. They are kinda wonky sirens, but they seem pretty stout.
https://www.youtube.com/watch?v=lGshbJ1j5PA
https://www.youtube.com/watch?v=vs9klNThJD4
https://www.youtube.com/watch?v=poPyVU98osE
https://www.youtube.com/watch?v=wj052y1htmA
This one's from a different channel but looks like a LK-JDL400. Sounds a little better than the demoed one from before.
https://www.youtube.com/watch?v=Q3iC-3_J-1k
If you want to see more videos of their sirens, albeit on 50 Hz, you can look at these channels:
https://www.youtube.com/user/TechnopolJSC
https://www.youtube.com/c/vietantoan
https://www.youtube.com/channel/UCNsXrH ... X45hToa4ag