Any suggestions on how to make my feed clearer?

I am currently hosting the PGFD feed for Prince Georges County Fire Department, using a PSR-800. I have been able to get it up and running however many people are complaining regarding the sound quality (garbled). I just purchased a signal amplifier but am awaiting its arrival. Any suggestions on how I can increase the quality in the meantime? The feed can be found here:



Laurel Volunteer Rescue Squad - Prince George's County, Maryland - Station 49

Any suggestions on how to make my feed clearer?