This chart lists all microphones currently marketed by FlexRadio, and the adapters, Profiles, BIAS voltage, and +20dB Mic Boost settings required to use them with FLEX-6000, FLEX-8000, Aurora radios, and Maestros.
| Microphone | Maestro A/B |
Maestro C (HDST) |
6300/6500/6700 (8-Pin Foster) | 6500/6700 BALANCED (XLR or TRS) |
6600(M)/6400(M) 8600(M)/8400(M) Aurora (1/8” TRS) |
6600/8600/AU-520(M) (1/4" BALANCED) | BIAS Voltage (+5 VDC) Needed? | 20 dB Boost Needed? | Starting Profile |
| FMH-1 | RJ-45 to RJ-45 FHM-x Microphone Cable – FlexRadio | RJ-45 to 8-pin Foster FHM-x Microphone Cable – FlexRadio | Needs RJ45 > TRS/RCA Cable | No | Yes | Default FHM-1 | |||
| FMH-2 | RJ-45 to RJ-45 FHM-x Microphone Cable – FlexRadio | not compatible | RJ-45 to 8-pin Foster FHM-x Microphone Cable – FlexRadio | Needs RJ45 > TRS/RCA Cable | Yes | Yes | Default FHM-2 / Default-FHM-2 DX | ||
| FMH-3 | RJ-45 to RJ-45 FHM-x Microphone Cable – FlexRadio | Maestro C - Y Cable Kit – FlexRadio | RJ-45 to 8-pin Foster FHM-x Microphone Cable – FlexRadio | Needs RJ45 > TRS/RCA Cable | Yes | No | Default FHM-3 / Default-FHM-3 DX | ||
| RS55SL (Designed for Maestro or Computer use) | Radiosport Headset Cable for SuperLight Travel Headset and Maestro (A & B) – FlexRadio | Included. Needs external PTT | Yes | No | RS-M20 / RS-M360 | ||||
| RS60CF-M20/M360 | Radiosport Headset Cable for Maestro A/B – FlexRadio | Radiosport Headset to TRRS Adapter Cable – FlexRadio | Radiosport Headset cable - miniXLR 6P Headset interface for 6400(M)/6600(M) – FlexRadio | Yes | No | RS-M20 / RS-M360 | |||
| CS6-MAE-C Headset-To-Radio cable for the Flex Maestro Model C – FlexRadio | Yes | No | |||||||
| RS60CF-M208/207 | Radiosport Headset Cable for Maestro A/B – FlexRadio | Radiosport Headset to TRRS Adapter Cable – FlexRadio | Radiosport Headset cable - 3-pin XLR – FlexRadio | Radiosport Headset cable - miniXLR 6P Headset interface for 6400(M)/6600(M) – FlexRadio | No | Yes | RS-208 / RS-207 | ||
| CS6-MAE-C Headset-To-Radio cable for the Flex Maestro Model C – FlexRadio | No | Yes | |||||||
| Balanced 3-pin XLR (Dynamic Mic only) | XLR female to XLR male cable - available at music stores and online markets | XLR female to 1/8 inch BALANCED TRS - available at music stores and online markets | XLR female to 1/4-inch BALANCED TRS - available at music stores and online markets | No | Yes | Varies, Depending upon the Mic: | |||
| OR: XLR female to 1/4-inch BALANCED TRS - available at music stores and online markets | No | Yes | |||||||
| Balanced 3-pin XLR (Condenser Mic) | Must use External Preamp or Mixer with "Phantom" Power | Must use External Preamp or Mixer with "Phantom" Power | Must use External Preamp or Mixer with "Phantom" Power | Must use External Preamp or Mixer with "Phantom" Power |
NO. Must use External 48 Volt "Phantom" supply or mixer |
Not usually. Depends upon Mic sensitivity | Varies, Depending upon the Mic: | ||
Microphone Pinouts for FlexRadios and Maestros: |
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| MIC-1 Input | HDST TRRS (CTIA) | 8-Pin Foster | 3-Pin XLR | 1/8 inch Pseudo-Balanced TRS | 1/4 Inch Balanced TRS | ||||
| See page 20 of the Maestro User Guide: | See the Maestro C Microphone Interfacing Guide | ||||||||
| Maestro User Guide v3.x – FlexRadio | Maestro C Microphone Interfacing Guide – FlexRadio | ||||||||
| MIC-2 Input | 1/4 Inch Balanced TRS | ||||||||
| See page 19 of the Maestro User Guide: | |||||||||
| Maestro User Guide v3.x – FlexRadio | |||||||||
| PTT Method | 1/8 inch PTT to Maestro | 1/8 inch PTT to Maestro | via Foster Plug | RCA PTT On Radio | RCA PTT On Radio | RCA PTT On Radio |