MX392 & MX393 on August 18, 2015 | Marketing Team Microflex Boundary Microphones Low profile, professional boundary microphones with interchangeable cartridges. Built-in preamp. MX392 and MX393 Microflex® Wired Boundary Microphones from Shure are equipped with features like programmable, silent membrane switches, logic inputs and outputs, and green LED indicators. The high-quality solution for a range of applications such as altars, boardrooms and distance learning centers, Microflex Boundary microphones feature interchangeable condenser cartridges. MX392: Surface-mount mic; LED logic input/switch logic output terminals, screw terminal connections, attached unterminated cable MX393: Surface-mount mic; miniature three pin connector, 12' XLR cable Features Flat frequency response across the vocal range for uncolored sound Interchangeable cardioid, supercardioid, and omnidirectional cartridges that provide optimal choice for each application Sleek, low-profile design for unobtrusive appearance Balanced, transformerless output for increased immunity to noise over long cable runs Programmable membrane on/off switch plus LED on/off indicator LED logic input and switch logic output terminals for remote control or use with automatic mixers (MX392 models only)