Why are BMRs advantageous in two way systems?

Two-way systems consist of 2 different drivers, each reproducing a different frequency band. These two drivers blend together at the systems crossover frequency, where ideally both speaker outputs sum to create a flat response through the transition. This crossover frequency in conventional driver systems is generally dictated by the limited low range capabilities of a tweeter, and the breakup of the low range driver as it reaches the top of its useable frequency band, and often lands between 1kHz-3kHz.

This range is an especially troublesome area for any abnormal phase or timing issues that may arise from a crossover, as the human ear is exceptionally sensitive to this area due to its association with the voice and speech intelligibility.

BMR drivers combat this issue by having a functional frequency range that spans the entire vocal range, and allows a crossover at a lower, less sensitive area. This is accomplished again by the balancing of desirable modal behaviour which supplements higher frequency behaviour with modal output. This also gives the low frequency woofer in the two way system a significant advantage, as it can now be optimized entirely for the low end of the system, as opposed to having to supplement the mid range as well.