Sensitivity (1W/1M)107 dB Frequency Response 3K-20KHZ Nominal Impedance (ohms)4Cut-out Diameter 1.75″ (44.45mm)Front of Horn to Magnet Depth 0.83″ (21mm)Depth Front to Back Magnet 2.3″ (58.7mm) Over-All Depth 2.22″ (56.4mm)Over-All Diameter 2.28″ (57.9mm)