at 200.00 ? My question is, If you block off the front opening how much ambient noise will the outer shell remove. If the background noise is outside the ball how much gets to the mic if the round opening is sealed. When using in the studio can I use one on each vocal and will it keep it vocal separated with no bleed over. Is this better than using a 4 ft circle of sm58s with one at 12, 3, 6, and 9.