THV 15" +10" +1" 3-Way Trapezoidal Hybrid Portrait LoudspeakerThe driver complement has been engineered for exemplary performance in all bands. The Hybrid low frequency section comprises a horn loaded 15 (380mm) 4 (100mm) voice coil driver that is reflex loaded to extend the LF output to below the natural horn cut off point. The LF driver features a water resistant cone and triple roll surround for increased excursion. The mid horn of the THV has a unique phase ball loading device which maintains the constant