The hardware used in radio and TV costs thousands of dollars. It's not unusual to find custom made mics built for a specific performer. Does your budget cover that kind of equipment?
I've never been in a station, but I'll bet I would find things like mixers and/or mic preamps which the engineers use to boost the sound coming from a mic to optimum levels. You would probably also find condensor mics which utilize XLR cables to connect to the sound equipment, and which are supplied by same with phantom power. The people using the mics are also in sound proof rooms.
You need good quality amplification, and a quiet place. Then add lots of controls like delays, reverb, etc. and you will start hearing a better sound.
Which recording hardware do live radio stations use to achieve crisp HI-FI voice broadcast?
Which matching Mic/headset, soundcard, mixer, or whatever, is required to achieve very clear crisp Hi-FI voice output close to live radio or tv broadcast?
Why do i have to shove microphone into my mouth before i get high audio output and undesirable airwaves from my lungs?