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Add instant sidetone and voice-activated VOX control to your 9er Systems adapter. Mac and Windows. Free for owners.
Download the ToolbarOur Products
Two product lines — simulator adapters for your desk, and PCB hardware for your panel.
Simulator Products
Aviation headset → USB, for your PC / Mac / iPad simulator setup.
USB2GA
For standard GA twin plugs (PJ-068 / PJ-055)
The original 9er Systems adapter. Fits the dual-plug headsets used in the vast majority of general aviation cockpits.
Learn more →
USB2Lemo
For 6-pin Lemo panel-power plugs
Same mountable enclosure as USB2GA, with a 6-pin Lemo jack on the front. For headsets with the panel-powered 6-pin Lemo connector.
Learn more →Aircraft Products
Real-aircraft installation hardware — for A&Ps, avionics shops, and DIY builders.
Common Questions
- Why won't my aviation headset microphone work on my computer?
- General aviation headset microphones are electret mics that need roughly 8–16V of phantom power (often called mic bias) — the aircraft's audio panel normally supplies it. A computer's mic input only provides about 5V, so the mic stays silent or barely works even with a plug adapter. A powered USB adapter such as the 9er Systems USB2GA or USB2Lemo generates +12V from the USB port and feeds it to the mic.
- Will the USB2GA or USB2Lemo work with my aviation headset?
- Almost certainly, if it's a modern general aviation headset with GA dual plugs (USB2GA) or a 6-pin Lemo plug (USB2Lemo). We test against a wide range of GA headsets — old and new, ANR and passive — including the Bose A20, Lightspeed Delta Zulu, Lightspeed Zulu 3, and 1990s-era FlightCom headsets. Military headsets have very different specifications and are untested.
- Do you make an adapter for Lemo (panel-power) headsets?
- Yes — the USB2Lemo connects headsets with a 6-pin Lemo (panel-power) plug to a computer, tablet, or phone over USB-C. It supplies the +12V phantom power (mic bias) the microphone needs, but it does not provide panel power, so a headset's ANR and Bluetooth features run on the headset's own batteries. The adapter itself needs no batteries.
- Do you make an adapter for helicopter (U-174) or XLR (Airbus) headsets?
- Not currently. We make adapters for GA dual-plug headsets (USB2GA) and 6-pin Lemo headsets (USB2Lemo). Helicopter U-174 and XLR (Airbus) headsets would need a separate plug adapter to GA dual plugs.
Why 9er Systems
Engineered, Produced, and Supported in the USA
Designed, assembled, and supported in Knoxville, TN. Components manufactured in Asheville NC, Ohio, Illinois, and elsewhere in the USA.
Powered by USB
Aviation headsets need power for their microphones. We supply it from your computer's USB port — no batteries, no wall warts.
Mount it once
Mountable enclosure with a sticky pad in the box. Mount under your desk or to your yoke and keep your wires under control.
Used by us
We test against a wide variety of GA headsets — old and new, ANR and passive. Pete uses his Bose A20 and Lightspeed Delta Zulu with it daily.