Classic Soft Dome Midrange unit, 8Ω. UK STOCK ITEM The Morel MDM 55 is a hybrid 54mm (2") soft dome midrange drive unit from the Classic series. This hand assembled unit has a low resonance of just 380 Hz and a wide linear bandwidth, the response between 2-5 kHz is flat ± 2dB or better. This unit has a very compact square faceplate allowing close spacing of drivers. Features include an Acuflex hand coated soft textile dome, 54mm Hexatech aluminium voice coil, a vented hybrid mixed magnet assembly and a critically tuned and damped aluminium rear chamber. Power handling is excellent at 200w nominal, 1000w peak. As usual with Morel products, design and build quality are top notch. A full datasheet can be downloaded from the bottom of this page. Key Features: Compact 87mm square face plate 54mm Acuflex™ hand coated soft dome Large Hexatech™ Aluminum voice coil Vented hybrid mixed magnet Critically tuned rear chamber Wide useable bandwidth High power handling Basic parameters: Resonant frequency (fs) 380Hz Nominal impedance (Zn) 8 Ω Effective diaphragm diameter 54mm DC resistance (Re) 6.2 Ω Ferrofluid ? Y/N Yes RMS power handling 200W Recommended crossover 1.2 kHz / 18dB Faceplate (square) 87 mm Sensitivity (2.83V/1m) 89.5dB Cutout hole diameter 76 mm Here's the full datasheet: MDM55