@bdgregory , Roy of Green Mountain advocated for 1st order / 6 dB crossovers. In practice they were more complicated than standard text book illustrations, in that they had elements added to compensate for driver irregularities, etc. in an effort towards making a complete time coherent speaker system as heard from the suggested listening position to speaker distance.
Crossover or crossoverless
The founder and builder of the highly respected high-end speaker company Gauder Akustik, Dr. Gauder, says that using a full-range driver is very bad. He uses 3- to 4-way speakers with extremely complex 10th-order crossovers consisting of 58–60 components.
In contrast, some other well-known and equally respected speaker companies — such as Voxativ, Zu, Cube Audio, and Totem — use crossoverless designs.
Who is right, and who is wrong?