Pilot USA Military Low To Dual GA High Impedance Adapter PA-88

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Part# 11-10645
MFR Model# PA-88


Amplified Impedance Converter: Low(Military) to High (General Aviation) Allows military low impedance headsets to be used in GA impedance aircraft.
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This is my second adapter I bought to use with one of several military headsets I have and it works phenomenal!!! This works great with my military Bose A 20s I use for flying that is single plug. I was hesitant at first because people kept saying the impedance adapter didnt work for them but I went ahead and decided to try it anyways and Im glad I did. These are a huge cost saving over buying a new nose that is almost a grand. My guess is the people that complained bought the dual plug adapter and not the dual plug impedance adapter.

Adam C Verified Purchase


August 15, 2022

Worked great with a Bose X military headset in a C-182.

April 20, 2021

Works great with my Mil surplus acft headset and the headset adapter for my Yaesu FTA750L HT.

November 24, 2020

Tested it on the ground and it seems to work just fine. Thank you! I appreciate the speedy delivery as well.

Bob G
July 8, 2020

Works great with my military David and Clark headset. Would highly recommend.

Austin H
August 29, 2019

Currently using my military Bose A20 on GA aircraft and this adapter is making it happen. Works great!

March 28, 2019

I flew with this yesterday. It works exactly as advertised. My MILSPEC H10-76 sounded and performed just like my civilian headset in the airplane. Good deal for the money.

March 14, 2019

This adapter works perfectly with my Bose A-20 headset. Good quality, fast shipping.

John L
November 4, 2018

Bought two for old USAF HGU-55/P helmets with military boom microphones. Worked flawlessly in civilian Varga 2150A aircraft (light GA single engine, common intercom and radio components). Really great, easily reversible way to make use of your military helmets and headphones!

Tobin W
September 13, 2018

This works perfectly with my older Bose X military headset.

Matt T
August 23, 2018


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Is the PA-88 Low to Dual GA high impedance adapter compatible with Bose A20 military headset?

Yes, this will work with the Bose A20 military to adapt to a GA dual plug headset application.

Q: Is this adapter compatible with the Bose X helicoter (U-147) headset?

No, this is designed to work with a military headset which uses the same U-174 plug as the helicopter version but has a low impedance mic. If you want to go from a helicopter U-174 plug to Dual GA plugs, use part number 11-10650.

Q: Will this PA-88 military low impedance to dual GA high impedance headset adapter fit the David Clark H10-76 headset?

Yes, the David Clark H10-76 has a low impedance military style single plug that will work with this adapter.

Q: Can this be used in a commercial 737 application and still have use of of the ANR?

As long as your 737 uses a GA dual plug system and you are connecting a military style headset this will work. The ANR will also work with this adapter.

Q: Does this PA-88 adapter require a battery?


Q: Will this work with an older military headset with a U-158 five conductor jack?

No, this is used only on military headsets equipped with the U174 style plug.

Q: Will this work with my military peltor headset? 3M type 88078-00000

If the headset is outfitted with a single U-174 plug type and is low impedance military style, this will work.

Q: Will this fit the David Clark 40853G-03 military headset?

Yes, this will work with this military headset.

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