Ultra long excursion Dual Copper voice coils to dramatically increase thermal capacity, heat dissipation and extended bass response (2x2 Ohm or 2x4 Ohm versions available )

Extended Polepiece to increase accuracy,raise induction and cool the coil

Ultra low resonant frequency allows reproduction of sub-frequencies in small sealed boxes

Radius on both top and bottom of the pole piece to prevent "wind"" noise

Machined die cast basket with cooling windows

Pentivent cooling

Solid,spring push, input connectors

Wide rubber surround and high excursion to allow deep bass

Double conex (by Dupont®) spider

Huge magnet