1" exit lightweight and compact ferrite magnet compression driver with 1.4" copper clad aluminium voice coil 20Wrms power handling (AES standard) and 106dB sensitivity 35mm/1.38in screw attachment One piece PETP diaphragm and surround Finite Element Analysis (FEA) techniques used to optimise both magnetic and acoustic design Suitable for 2-way and 3-way systems