The FBT ProMaxX 10Atwo-way bi-amplifi¬ed speaker systems hall incorporate 1 x 10” LF neodymium magnet woofer with 2.5” voice coil , custom made for FBT by B&C and 1” exit throat B&C neodymium magnet compression driver with 1.4” voice coil coupled to a 90°H x 60°V constant directivity horn.