Check the listing for details. BMS 4592ND-MID 2" Midrange Compression Driver Neodymium Middle 8 Ohm. Color: Black, Condition: Open box. Listed at 645.00 USD. BMS 4592ND-MID 2" Midrange Neodymium Compression Driver 8 Ohm (New Open Box) The patented design of the BMS 4592ND-MID Midrange is a result of extensive dedicated research and development providing dramatic improvement in dynamic response, clarity and transparency. The BMS annular midrange diaphragm covers the frequency range between 300 and 7000 Hz with a smooth, linear response. The large diaphragm excursion of max. + / - 0,8 mm results in high output and increased power handling up to 1000 W peak. The BMS exclusive voice coil technology employs a light weight Copper Clad Aluminium wire wound inside and outside of the Kapton™ former to improve the heat dissipation, dramatically increasing the acoustic output and reliability of the driver while minimising the power compression.2” Middle Range Driver (300-7000Hz)Unique patented Design118 dB sensitivity 1W/1m300 Hz Crossover3.5" (90mm) Voice Coil8 OhmFounded 1994 and located in Hannover, Germany, BMS is a leading designer and manufacturer of highest quality transducers. BMS products are used by professional speaker and high-end companies globally.