This is one great mic
I agree 100% with Jeff's assessment of the OM7. I sing lead in a 5-pc Irish/Celtic band and had tried all the OMs except the OM7 since it's the only one our local Audix dealer doesn't stock. Of the ones I tried, I liked the OM5 and OM6, but the 5 was too bright and mid-rangy overall, and the 6 was nice and smooth but too flat and lifeless. So I passed on any of the OMs....but hadn't tried the 7 This mic is possibly the best mic I've used, including my Senn e935, e945, and Heil PR22. Naturally, I'm basing this on my voice (high baritone/low-mid tenor and ranges from soft to powerful), as well as the type of music we do.
As Jeff said, it's very lively and sweet sounding. To me, the OM7 exudes power and life, yet handles the softer stuff with excellence and great clarity. For me, the OM7 bridges the gap between the OM5's brightness and the OM6's smooth but rather flat character, producing a nice clear high end without being too bright, excellent mid presence, and smooth, balanced low end without being boomy. The OM7 is strong and clear in the monitors and I can easily hear myself over the mix without being too dominant. My style is to sing with my mouth touching the mic or about 1" away, so this mic is a good fit and I feel very comfortable using it.
After reading so many reviews about needing a strong sound system for the OM7's low output, I was skeptical about it working with our Gigrac 1000 mixer, and yes, I had to crank the channel vol a bit, but there's plenty of gain. As expected, no feedback/bleed issues at all.
The OM7 has what I'd consider average plosive/sibilance issues. The Gigrac doesn't have a high pass, but I roll off the channel bass to about 9:00 and helps a lot. Technique can diminish these issues somewhat, but I sometimes use a foam windscreen....which I hate to do but is sometimes necessary. Windscreens always affect sound a bit and different windscreens will affect sound in different ways. I have several and found one that best maintains the OM7's great sound while preventing plosives and sibilance.
Overall, the OM7 is probably the best dynamic mic I've used. As my rating indicates, I was in fact blown away by this mic and highly recommend at least trying it.