Hows the radio tuned ? Do you have talkback installed ? 148s have big audio to begin with , I could see your radio working fine the way you have it set before it takes off to squeal land. But it should be able to take everything you can throw at it in the audio department if it's tuned right .(to a degree anyway) Roger beep ? No offence here , but I hate those things with a passion !! could it cause you a problem ? YES !But not necessarily. Whats your antenna system all about ? bottom line here is that I think with the way you have the audio set on the radio and mic without squealing , IM sure you will still have all the audio you would need. Remember , it's a NC Mic and you need to basically eat those mic's when your talking into them.