Is the delay at all frequencies or (as the acronym EBA implies) just the lower frequencies?
Delaying all frequencies is easy.

The "problem" is *progressive* group delay in the lower bass frequencies, especially in ported speakers (there's no escaping the physics). In the bass drivers, EBA corrects this by applying variable delay to less affected frequencies, to bring every frequency
produced by the same driver(s) to the same group delay value. Non-bass drivers *do* have a constant group delay applied to bring them in line with the corrected bass drivers.