Only by getting a bigger wattage siren or lower wattage speaker. They should match power.
So your saying switch to the Chinese stuff since they always have a need for loud? Is it possibly or more then likely a overrated speaker in wattage or a bad driver?
Now I have to see if the lights work from theWell. Found the problem. The wire in the harness for the auxiliary lights is actually the one for the siren. When I hooked the “lights“ up I almost blew myself out of my shed it was so loud.