HEIL PMDIC

The Pro Micro is a lightweight single-side or dual-side headset designed for Amateur Radio use. To accommodate different radio setups, the Pro Micro is available with either a Dynamic element or an iC electret element.

The speakers used in the Pro Micro are very sensitive and don’t require much AF gain from the transceiver. The frequency response is 20 Hz – 17 kHz with very low distortion. The ear pads are replaceable acoustic foam.

The Pro Micro 6: The headset is outfitted with the HC-6 dynamic microphone element. Designed for Amateur Radio applications, the -3dB points are fixed at 100 Hz and 12 kHz with a sensitivity of -57 dB at 600 ohms output impedance (centered at 1 kHz.)

The microphone audio for the Pro Micro series terminates into a 1/8” male plug while the headphone terminates into a 1/8” stereo with an adaptor.

The use of the AD-1 series mic adapters allow simple interface with popular transceiver inputs. The adapter cable has a 1/8” female input jack for the boomset microphone and a 1/4” female that is for the PTT (push to talk) line for the Heil foot switch or hand switch. The 1/4” stereo plug goes into the headphone jack on the transceiver front panel. To find out which AD-1 adapter cable will work with your radio please consult the Heil Sound Adapter Selector. 

To adjust the headset simply bend the stainless steel piece that is inside the black padded headband.

All Heil Pro Micro Boomsets are shipped with foam windscreen that fits over the microphone. The windscreen does not change the frequency response, just the breath blasts directly into the microphone.

Note: To use dynamic mic elements on vintage radios (requiring a high impedance input of 10k to 30k ohms) will require the use of an XT-1 impedance matching transformer.

Some state laws prohibit the use of headsets while operating a vehicle. Please check with your local regulations and restrictions prior to usage of this product while operating a vehicle.