In ear monitors.
When I first started performing, I had no stage monitors at all. When stage wedges and side fills became available I thought I was in heaven, it couldn't get any better. When in ears started to become popular, i avoided them. I loved the ambient sound of the room...After much cajoling by friends of mine from The Ides of March and survivor. I bought a pair..I should have done this years ago. It makes singing effortless. I love these. I chose sure because of my familiarity and love of their microphones...These are a miracle.