distancing and input gain
really if your think about, can your singer outsing a double stack marshall or randall 100-150 watt guitar amp? probably not. its all a matter of distancing and input gain setting. get him at about 4 ft (max) from the vocal condensor, and get him to scream as loud as he can, set your mic appropriately. rememer to use an input dB pad if necessary. 30' ft is ridiculous, i use my condensor to quickly record our jams , the ENTIRE band making huge noise levels, maybe even 90 dB at times, drums, guitars, bass vocals, everything.. and we still only have the condensor 5 ft in front of the front end. just keep tweaking your distance and gain, trying to maintain at least 1/3 of your gain dial. Don't compress on the way in unless you have a very expensive sweet sounding compressor, save that for onscreen later, that way you can transparently add compression, gating and or limited *only where* needed and softly go in and out so it goes un-noticed. often i dont bother, all i do is physically lower the amplitude of a "chunk" or region. where the vocal is too loud, that way your entire wav is more uniform, and during master you can expand, and compress simultaneously to get that FULL sound you hear so much today... where all the headroom is full on the CD, like Staind or Creed or whatever, instead of sounding weak at any moment - of course some people hate that style of production, and prefer the 80's when music actually had dynamic attenuation haha
my 2 cents