Check the listing for details. Beyma CP755Nd 1.4" Compression Driver Neodymium High Frequency 8 Ohm. Condition: New. Listed at 419.00 USD. Beyma CP755Nd 1.4" Compression Driver 8 Ohm (Dolby Labeled) The CP755Nd high frequency compression driver features a composite structure diaphragm. It has a Mylar surround to provide damping and avoid resonant peaks typical of metal surrounds. The 2.85" dome is made of pure titanium, with its unique mechanical properties. This diaphragm combined with a new optimized phasing-plug and a copper ring, results in an extremely smoothed and extended high frequency response. Key Features: 1.4” exit (36mm) high frequency compression driverWide frequency range (600Hz - 20kHz)2.85" Titanium dome with polyester surroundShorting copper cap for low distortion and extended responseLarge Neodymium magnetAluminium coverSensitivity: 110 dB (1W/1m)2.85” (72mm) voice coil diameterSpecifications:Frequency range: 600Hz - 20kHzRecommended crossover: 800Hz or higherNominal diameter: 1.4"Sensitivity (1W/1m): 110 dB (coupled to horn)Program power: 150W Voice coil diameter: 72.4mm (2.85")Rated impedance: 8 OhmsMinimum impedance: 7.1 OhmsD.C. resistance: 5.5 OhmsBl factor: 11.5 Mounting Information:Overall diameter: 145mm (5.7")Depth: 66mm (2.6")Mounting: Four M6 threaded holes 90º apart on 4" diameter circleNet weight: 6.8 lbs