1” exit, ferrite magnet compression driver with 1.75” edge-wound copper clad aluminium voice coil and one-piece PETP diaphragm and surround that provides 40W RMS power handling (AES standard) and 110dB sensitivity. It features the Sound Castle clamping, which ensures even pressure on diaphragm assembly for reduced distortion. The Finite Element Analysis (FEA) is used to optimise both magnet assembly and acoustic design. Nominal impedance: 8 Ohm. Frequency range: 1.2-20 kHz. Unit weight: 3 kg.