"what do you mean by forward and laid back"
Laid back meaning the soundstage is mostly behind the plane of the speakers.
Forward meaning that the soundstage is not so much behind the plane of the speakers and some things may sound like they originate from locations that are in front of the plane of the speakers. In some lively rooms, due to reflections, sound might even sound like the origin is behind the listener to some extent.
I have heard both dynamic and planar designs have a quite forward sound in certain lively rooms, but not so much omnis. I expect horns might as well. granted, room acoustics play a big part in this.
Laid back meaning the soundstage is mostly behind the plane of the speakers.
Forward meaning that the soundstage is not so much behind the plane of the speakers and some things may sound like they originate from locations that are in front of the plane of the speakers. In some lively rooms, due to reflections, sound might even sound like the origin is behind the listener to some extent.
I have heard both dynamic and planar designs have a quite forward sound in certain lively rooms, but not so much omnis. I expect horns might as well. granted, room acoustics play a big part in this.

