Eminence NSD-2005 1" compression driver

This is a NEW eminence NSD-2005 ohm High Frequency Driver/Horn; 8  NSD:2005                    SPECIFICATIONS                            Throat Size            1", 25.4mm     Nominal Impedance*            8 or 16 ohms     Power Rating**            50W @ 1.5kHz                        Resonance            578Hz     Usable Frequency Range            1.5kHz-20kHz     Sensitivity***            108.4dB (1W/1m across 1.5kHz-16kHz)     Magnet Weight            4.16 oz.     Voice Coil Diameter            2", 51mm            THIELE & SMALL PARAMETERS                DC Resistance (Re)            6.8             Download PDF Spec Sheet  Coil Inductance (Le)            .95 mH                           MOUNTING INFORMATION                Overall Diameter            3.87", 98.3mm     Mounting Holes Diameter            2X 1/4-20     Mounting Holes B.C. D.            3"                Mounting Thread            1 3/8" 18 NEF ext.                Depth            1.75", 44mm