Many of the most popular designs deal with the 2k crossover challenge in different ways. You may not realize it, but you are hearing the challenges of a crossover in the presence region.
It expresses itself as a lack of coherence, which can be discovered when you hear a good speaker that is not playing with overlapping transducers or is using a very simple, low sloping crossover.
Thiel, Vandersteen, etc. deal with crossover induced phase shifts caused by woofer tweeter integration by using a first order crossover. Omega runs their widebanders without tweeter support. Spatial Audio uses compression drivers that are crossed low enough to mostly get out of the way.
The above design examples create different compromises, but how they deal with the coherence challenge is a big part of their secret sauce.
It expresses itself as a lack of coherence, which can be discovered when you hear a good speaker that is not playing with overlapping transducers or is using a very simple, low sloping crossover.
Thiel, Vandersteen, etc. deal with crossover induced phase shifts caused by woofer tweeter integration by using a first order crossover. Omega runs their widebanders without tweeter support. Spatial Audio uses compression drivers that are crossed low enough to mostly get out of the way.
The above design examples create different compromises, but how they deal with the coherence challenge is a big part of their secret sauce.