Shure MX391/O Condenser Microphone (Omni) Flat frequency response across the vocal range for uncolored sound. Sleek, low-profile design for unobtrusive appearance. Balanced, transformer less output for increased immunity to noise over long cable runs. Includes attached 4 meter (12 ft) cable terminated with a 4-pin mini connector and separate preamplifier. A rubber strain relief is provided for applications that require removing the 4-pin mini connector and connecting the mic cable directly to screw terminals in the preamplifier. Flat frequency response across the vocal range for uncolored sound. Sleek, low-profile design for unobtrusive appearance. Balanced, transformer less output for increased immunity to noise over long cable runs. Includes attached 4 meter (12 ft) cable terminated with a 4-pin mini connector and separate preamplifier. A rubber strain relief is provided for applications that require removing the 4-pin mini connector Connecting the mic cable directly to screw terminals in the preamplifier.