I just got a pair of the Studio Projects C4's and to me, using one C4 on my voice sounds so much better than my C1. I sing hard rock, and the C1 was sounding too "tinny" on the high end and thin bodied. Granted, I'm only using a GT brick preamp into an MBox, but swapping to a C4 makes a hell of a difference. The C4 sounds so much warmer and darker, reproducing my higher register with a more appealing tone. Anyone else rather use these little guys over larger condensers to record louder and higher ranged vocalists? I think I'm going to sell my C1.