I have an EV 676 mic that has no grill. I just bought a second one (has not arrived) that also has no grill. There seems to be several layers between the business part (the correct term escapes me) and the screen, if the unit was complete. It would run fine mesh screen, very fine mesh cloth, cast part with large holes, foam insert, and finally outer screen. I am missing the last two. Assuming the mics are only used for instruments and not vocals, how much effect do these various parts have on the sound that is recorded? And does anyone here have experience or comments about this model?