Wait, I'm a little confused --- are you trying to say you tried out the Heaven IV and wore it over the ear? Microphonics of the Heaven IV aren't too bad when it's worn over-the-ear. It's when it is worn straight-down that it becomes a problem. Unfortunately, the shape of the Heaven IV just isn't conducive to over-the-ear wearing, much like the shape of the ER4. It just looks silly when either the Heaven IV or ER4 is worn over-the-ear.
Nope, I was talking about the BA200.