Nominal Impendance : 8 Ohm Rated Power : 400 W Max Power : 800 W Sensitivity : 109db/w/m HMA Sound Equipment Frequency Range : 1.0-20kHz Diaphgram Material : Titanium Voice Coil : 51.6mm (2in) HMA Sound Equipment Flux Density : 1.75T Throat : 1in (25mm)