never mind - found it
"EMIT's are not ribbon speakers. They are planar magnetics. Planar magnetic speakers have a voice coil printed on or attached/glued to a diaphragm. With true ribbons the entire radiating surface is a conductor.
The name EMIT means; electromagnetic induction tweeter."
Thus EMIT-R would be Electromagnetic Induction Tweeter - Radial
"EMIT's are not ribbon speakers. They are planar magnetics. Planar magnetic speakers have a voice coil printed on or attached/glued to a diaphragm. With true ribbons the entire radiating surface is a conductor.
The name EMIT means; electromagnetic induction tweeter."
Thus EMIT-R would be Electromagnetic Induction Tweeter - Radial