An advanced network topology crossover design shapes frequency response and delivers coherent summation in the crossover region, and a "Quasi 3-Way" design offers the extra bass for which a dual fifteen system is designed, but without sacrificing performance in the critical mid-range. The upper woofer produces mid-frequencies and bass, while the lower woofer concentrates on bass only. The reduction in mid-range phase cancellation greatly improves midrange sound quality and coverage. It additionally has high-voltage capacitors and inductors with massive cores and heavy gauge wire that enables the crossover network to handle high power without saturating.

A Progressive Transition high frequency waveguide provides superior coverage control, reduced distortion, and smoother frequency response. The rugged, acoustically superior enclosure is constructed from .75" MDF (Medium Density Fiberboard) using advanced adhesives and mechanical fastener technology for extreme durability and improved low-frequency performance. SonicGuard protects the highfrequency driver from excess power without interrupting the performance. Non-resonant, all-steel handles,