Thanks for the welcome.

I tried to turn the rotor but it was significantly hard to turn. That's what I mean when I said that the motor is stiff.

I agree that this siren is still better than a home-made siren, but there is a possibility of 3D printing a siren.

I have this small red siren in a container. Just recently, I decided to try and run it, but I found out that the motor was stiff. It would not turn and only hummed. I don't need any advice on how to fix it, I already know how. I won't be repairing it until we actually need it. Anyway, here are the l...