Decoding the Bose X: What Do the AHX Model Numbers Actually Mean?
Are you looking at a used Bose Aviation Headset X on eBay or Facebook Marketplace, or sitting on a shelf in your buddy's basement, but aren't sure if it's worth buying or if it will actually work in your airplane?
Don't be afraid of a Bose X that has seen better days.
The iconic Bose X, also known as the A10, was introduced in 1998 and enjoyed a legendary production run before being discontinued in 2010 to make way for the Bose A20. These headsets were built to last, which is why thousands of them are still flying today, and countless others can be found on the used market at surprisingly affordable prices.
And that's where things get interesting.
At Hobbs Flyer, we stock nearly every part you need to bring one back to its former glory. Worn ear seals, deteriorated head cushions, broken yokes, damaged microphones, bad speakers, cracked microphone housings, worn cables, and other common problems can all be repaired or replaced. In fact, we carry replacement parts for roughly 99% of the components you're likely to need when restoring a Bose X.
Prefer to leave the restoration to us? We can do that too. Our professional aviation headset repair service can diagnose, repair, and restore your Bose X for you. Whether you've picked up a used headset that needs a little attention or one that needs a complete overhaul like the one below that we received from one of our customers, send it to us, and we'll help get it back in the air.
That means the old, worn, or even partially broken Bose X you find on eBay doesn't necessarily have to be a deal breaker. Whether you want to restore it yourself with our replacement parts or have our technicians do the work for you, these legendary headsets can often be brought back to life for many more years of flying.Â
So condition doesn't necessarily have to scare you away as these headset can essentially be brought back to almost new condition. What you really need to pay attention to is which Bose X you're buying.
Bose produced several different versions of the Bose X under the AHX model line, and while they may look nearly identical on the outside, what's inside can be very different. A single digit in the model number can tell you whether you're looking at a standard GA twin plug headset, a panel powered LEMO version, or a specialized helicopter configuration. Some models even use low impedance military microphones that are not compatible with a standard civilian aircraft intercom.
That's why knowing how to read the model tag is so important when shopping for a used Bose X. Before you hand over your money, take 60 seconds to check the model number and make sure you're buying the right version for your aircraft.
Here's exactly how to decode it.
1. Look at the Plugs: The Quick Visual Check
Dual General Aviation (GA) Plugs
- What they look like: Two separate metal prongs. One is a thick 1/4" plug (audio) and the other is a thinner 3/16" plug (microphone).
- The Cable: Straight cord.
- The Models: AHX-32-01, AHX-32-02, AHX-04, or AHX-05.
Single Helicopter Plug (U-174)
- What it looks like: A single, short, stubby metal plug with four distinct metal segments separated by plastic rings.
- The Cable: Heavy-duty coiled cord or straight cord.
- The Models: AHX-32-04 or AHX-32-05.
6-Pin Panel-Powered (LEMO) Plug
- What it looks like: A single, round, precision plug with 6 small male pins inside. It features a slide-locking sleeve.
- The Cable: Straight cord. Note that these models have a slim control module that does not hold AA batteries, as it pulls power directly from the aircraft. with the right adapter, these can be powered and used in twin plug aircraft.Â
- The Models: AHX-34-01 or AHX-34-08.
8-Pin Fischer Plug
- What it looks like: A specialized, premium metal round push-pull locking connector with 8 internal pins. Primarily found on specific European helicopters like Agusta.
- The Models: AHX-34-03.
2. Match the Part Number: The Master AHX Registry
| Model Number | Connector Type | Microphone Type | Power Source | Primary Aircraft Type |
|---|---|---|---|---|
| AHX-32-01 | Dual GA Plugs | High-Impedance Electret | 2 AA Batteries | Standard Fixed-Wing (Cessna, Piper, etc.) |
| AHX-32-02 | Dual GA Plugs | Low-Impedance Dynamic | 2 AA Batteries | Military / Specialty Fixed-Wing Trainers |
| AHX-32-04 | Single U-174/U | High-Impedance Electret | 2 AA Batteries | Standard Civilian Helicopters (Robinson, Bell) |
| AHX-32-05 | Single U-174/U | Low-Impedance Dynamic | 2 AA Batteries | Military / Specialized Rotorcraft |
| AHX-34-01 | 6-Pin LEMO | High-Impedance Electret | Aircraft Panel Power | Premium Fixed-Wing / Panel-Installed |
| AHX-34-03 | 8-Pin Fischer | High-Impedance Electret | Aircraft Panel Power | Agusta / Specialized European Helicopters |
| AHX-34-08 | 6-Pin LEMO | High-Impedance Electret | Aircraft Panel Power | Alternative Panel Revision Variation |
3. Watch Out for the "Microphone Trap"
- High-Impedance Electret (Models ending in -01, -04, -03): This is what 99% of civilian pilots need. If you fly a standard rental plane or a civilian helicopter, you must have an electret mic.
- Low-Impedance Dynamic (Models ending in -02, -05): These are built for military intercom environments. If you plug an AHX-32-02 into a civilian Cessna 172, your microphone will not work, and ATC will hear nothing but dead air.
Can You Convert Them?
- External Adapters: You can easily buy a 6-pin LEMO to Dual GA adapter, or a Helicopter to Dual GA adapter. Note that adapters cannot magically change a low-impedance military mic into a high-impedance civilian mic without a built-in electronic impedance converter.
- Cable Replacement: The entire down-cable and control module assembly on the Bose X is modular. You can replace the entire cable assembly to convert the headset permanently.
The Bose Aviation Headset X remains one of the best values in aviation, even decades after its 1998 debut. By taking just a moment to verify the AHX model number before you buy, you can track down a premium ANR headset that perfectly matches your aircraft without any unexpected compatibility surprises. Whether you choose a plug-and-play dual GA model or decide to convert a panel-powered variant with an adapter, knowing exactly what you are plugging into your intercom ensures clear communications on every flight.
Keeping Great Aviation Headsets Flyingâ„¢
At Hobbs Flyer, we believe in Keeping Great Aviation Headsets Flying™ by developing high-quality replacement parts that make common repairs simple, affordable, and reliable. With just a few minutes of work, you can restore your Bose A20 and get back to doing what you enjoy most—flying.