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Heil Sound presents the new HM-12 Microphone, designed specifically for Amateur Radio communications. Their high output, full-range 'Genesis' dynamic elements are designed to work with just about every Amateur transceiver low impedance mic input. HM-12 elements are secured in a unique internal shock mount and exhibit nearly 35 dB of rear rejection to reduce background and ambient noise from the transmitted signal. Heil HM-12 Microphones exhibit very natural audio response from 80Hz - 14 kHz. The traditional Heil +4 dB peak centered at 2 kHz gives the new HM-12 excellent voice articulation balanced with clean, clear low-end response for producing high quality AM, FM or SSB signals. These microphones feature a 'soft touch' PTT switch, wired to pins 3 and 4 for transmitter control. Microphone audio signals are fed to pins 1 and 2 of the four-pin XLR. Heil HM -12 Microphones use the CC-1 series cables and feature an internal foam windscreen. They include 5/8-27 microphone clips that fit all Heil booms and desk stands.