Have any of you who use IEMs on stage, ever tried or heard of this little device? http://rev33.com/ I'm curious what this does.

If you go to Sonion's website, you will find a lot of helpful PDF's that cover those topics. Look for one called "Designing Earphones" .

Hi Everybody! I've been lurking around this forum for a couple years now but thought it was about time I actually register. This is my first attempt at participating in any forum so please go easy on me:) If you ordered the O1, you might be in for a bit of disappointment. I'm not 100%...