Why the Bose A20 Was the #1 Selling Aviation Headset
For over a decade, the Bose A20 Aviation Headset set the gold standard for pilots, earning a massive fan base for its amazing sound quality and durable design. However, Bose has officially discontinued the A20 to make way for its successor, the Bose A30 Aviation Headset.
While the A30 is now the current model, the A20 retains a legendary status within the aviation community. In this review, we'll explore the factors that contributed to the A20's enduring appeal and why its DNA lives on in the new A30.
For over a decade, the Bose A20 Aviation Headset set the gold standard for pilots, earning a massive fan base for its amazing sound quality and durable design. Then Bose officially discontinued the A20 to make way for its successor, the Bose A30 Aviation Headset. New A20s are gone from dealer shelves, yet thousands of pilots still fly behind one every day and plenty more are shopping the used market for theirs.
So this guide answers the questions A20 pilots are actually asking in 2026: what made the A20 the best-selling aviation headset of its era, whether a used one is still worth buying, what changed in the A30, and how to keep an A20 you already own flying with the right replacement parts. No nostalgia tax, just straight answers.
Key Takeaways
- Bose discontinued the A20 in 2023 when the A30 launched, so any A20 you find today is used or old stock, never new production.
- The A20 earned its #1 status honestly: roughly 30 percent better noise reduction than the headsets it replaced, a 12-ounce on-head weight, FAA TSO certification, and a 5-year warranty.
- A clean used A20 is still a credible buy in 2026, because Bose continues to service the headset and consumable parts remain in production.
- The Bose A30 is the direct successor, with about 20 percent less clamping force, three selectable noise cancellation modes, and a toolless side-swappable down cable.
- If the A20 is your primary headset, fresh ear seals and a new mic windscreen are the cheapest performance upgrades you can make.
Why Was the Bose A20 the #1 Selling Aviation Headset?
The A20 retains a legendary status within the aviation community for good reason. It dominated GA flight decks, corporate cockpits, and airline flight bags for over a decade, and its DNA lives on in the A30. Here is what made it the benchmark.
Noise Reduction and Comfort
One of the best features of the Bose A20 was its outstanding noise reduction, boasting a 30 percent improvement over previous aviation headsets of its time. Combined with excellent Active Noise Reduction (ANR), Bose headsets create a peaceful flying experience on both long and short flights.
The A20 was designed with meticulous attention to detail, weighing just 12 ounces on the head. The Bose A30 builds on that legacy with a refined design that features 20 percent less clamping force than the A20, maintaining that plush comfort for even longer hauls.
Smart Operation and Customizable Audio
Managing your in-flight audio was always easy with the Bose A20. The headset featured a control module that allowed effortless navigation, while an auxiliary audio input and intercom/AUX priority switching made it simple to incorporate external devices like GPS and traffic warning systems.
With customizable audio prioritization controls, pilots could choose between mute and mix settings, deciding whether music and alerts duck out when the radio comes alive. The A30 takes this a step further with a toolless, side-swappable down cable and three selectable modes of active noise cancellation.
Technical Specifications and Versatility
The Bose A20 was an impressive piece of technology, and these are the pillars that made the series so reliable:
- Active noise cancelling and Bluetooth: noise reduction, active equalization, and Bluetooth connectivity made it the top choice in aviation headsets.
- FAA TSO and E/TSO-C139 certification: the A20 received FAA TSO approval, proving its high standards of safety and quality.
- Clear communications: a state-of-the-art microphone and speaker setup kept transmissions crystal clear even in the loudest cockpits.
- Versatile connectivity: the A20 shipped in dual GA, LEMO 6-pin panel-power, and U174 helicopter configurations, covering nearly every airframe.
Reliability and Warranty
Bose stands behind its aviation headsets with an impressive 5-year warranty, and that promise did not end with production. While the A20 is no longer manufactured, Bose continues to support and service the product. That long support tail is a major reason used A20s hold their value better than almost any other piece of avionics-adjacent gear.
Is a Used Bose A20 Still Worth Buying in 2026?
Often, yes. The A20's noise reduction and audio quality are still excellent by 2026 standards, and ongoing factory support means a used unit is not a dead end. The decision comes down to condition and how you will use it.
What to Check Before You Buy a Used A20
- Ear seals and head pad: cracking, flaking, or flattened seals are normal wear and cheap to replace, but they tell you how hard the headset was used.
- Battery box: open it and look for corrosion from leaked AA batteries, the most common killer of otherwise healthy A20s.
- Cable and plugs: check the jacket for nicks and the plugs for bent pins, and confirm the connector type (dual GA, LEMO, or U174) actually matches your aircraft.
- Bluetooth: Bose sold the A20 in Bluetooth and non-Bluetooth versions throughout production, so verify the control module has it if pairing with ForeFlight matters to you.
- Microphone side: the A20 boom mic is fixed to one side, so make sure it is on the side you fly.
- Serial number: ask for it and check service history with Bose aviation support before you hand over money.
When a Used A20 Makes Sense, and When It Does Not
A clean used A20 is a smart buy as a second headset for the right seat, a passenger headset that will not embarrass you, or a budget path into premium ANR. If you are buying the headset you will wear for the next thousand hours, the math changes: a new Bose A30 gets you current production, a full 5-year factory warranty, and the comfort improvements below.
Bose A20 vs Bose A30: What Actually Changed?
The A30 is an evolution, not a reinvention. Bose kept everything pilots loved about the A20 and fixed its few real complaints. Here is the honest comparison.
| Feature | Bose A20 (Discontinued) | Bose A30 |
|---|---|---|
| Availability | Used market only, discontinued 2023 | Current model, in production |
| Clamping force | Baseline | About 20 percent lower |
| Active noise cancellation | One fixed level | Three selectable modes |
| Boom mic and down cable | Fixed side, service swap required | Toolless, side-swappable |
| Bluetooth | Optional, sold in Bluetooth and non-Bluetooth versions | Standard, with mute or mix prioritization |
| Certification | FAA TSO and E/TSO-C139 | FAA TSO certified |
| Warranty | 5-year, honored on existing units | 5-year factory warranty |
The takeaway: pilots upgrade from the A20 to the A30 for comfort and flexibility, not because the A20 suddenly got loud. If your A20 still seals well and your neck is happy after a four-hour leg, keep flying it. If the clamping force has always bugged you, the A30 fixes exactly that.
Which Bose A30 Configuration Fits Your Cockpit?
The A30 ships in the same connector configurations the A20 did, so replacing an A20 is a one-for-one swap. Match the plug to your aircraft, then click any model name to jump to its full review.
| Model | Connector and Power | Best For |
|---|---|---|
| Bose A30, Dual GA Plug | Dual GA plugs, AA battery power | Most fixed-wing pilots and renters |
| Bose A30, LEMO 6-Pin | 6-pin LEMO, aircraft panel power | Owners with LEMO-wired panels |
| Bose A30, U174 Helicopter | U174 plug, AA battery power | Helicopter pilots |
Bose A30 Aviation Headset, Dual GA Plug with Bluetooth
- Connector Dual GA plugs
- Power AA batteries
- Bluetooth Standard, with mute or mix audio prioritization
This is the configuration most A20 pilots should buy. The dual plug, battery-powered Bose A30 works in essentially every rental, club, and privately owned fixed-wing GA aircraft, and it carries the A20's strengths forward: benchmark noise reduction, crystal-clear mic audio, and TSO certification.
- About 20 percent less clamping force than the A20 you are replacing
- Three selectable noise cancellation modes for piston, turboprop, and jet noise environments
- Toolless down cable that swaps to either side, so the mic finally moves with you
- Bluetooth audio for ForeFlight alerts, music, and phone calls with mute or mix control
- Everything the A20 did, with the two most common A20 complaints (clamping force and the fixed mic side) engineered out.
- It is a premium investment, and like the A20 it runs on AA batteries in this configuration, so keep spares in the flight bag.
Perfect for fixed-wing pilots replacing a dual-plug A20 or buying their first premium ANR headset.
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Bose A30 Aviation Headset, LEMO 6-Pin Aircraft Power
- Connector 6-pin LEMO
- Power Aircraft panel power, no batteries
- Bluetooth Standard
If your panel was wired with LEMO jacks for an A20, the LEMO A30 plugs into the same 6-pin connector and draws ship's power the same way. No rewiring, no battery box on the cable, no dead-battery surprises on a night IFR departure.
- Drop-in replacement for an existing A20 LEMO installation
- Panel power eliminates AA batteries entirely
- Same three-mode noise cancellation and comfort upgrades as the dual-plug A30
- Cleaner cable run for owner-flown aircraft
- The tidiest possible setup for aircraft owners, and the easiest A20-to-A30 transition there is.
- A LEMO headset needs Bose's 6-pin-to-dual-GA adapter (part 327080-0010) to fly in a standard twin-jack rental. The adapter handles the plugs, and you load AA batteries into the A30's battery compartment (every A30 has one) so ANR and Bluetooth keep working away from panel power. If most of your flying is in twin-jack aircraft, choose the dual plug version instead.
Perfect for aircraft owners with LEMO-wired panels, especially anyone replacing a panel-powered A20.
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Bose A30 Aviation Headset, U174 Helicopter
- Connector U174 helicopter plug
- Power AA batteries
- Bluetooth Standard
Helicopter cockpits are among the loudest places the A20 ever worked, and the U174 A30 picks up that job with the same single-plug helicopter connector and battery power. The three selectable noise cancellation modes earn their keep against rotor and transmission noise that changes character throughout the flight.
- U174 plug fits standard helicopter intercom jacks
- Selectable ANC modes tuned for high-noise rotor-wing environments
- The lighter fit matters even more on a helmet-free long line day
- Bluetooth for tablet apps and phone coordination between flights
- Brings the A30's comfort gains to the pilots who wear a headset the most hours per day.
- If your operation requires a helmet, this is not a helmet system; it replaces a U174-equipped headset like the helicopter A20.
Perfect for helicopter pilots replacing a U174 A20 or stepping up from a passive headset.
Click for Price →Keep Your A20 Flying: Replacement Parts That Still Fit
Not ready to retire your A20? Good. A well-maintained A20 has years left in it, and the consumables that restore it are inexpensive. These are the parts we stock in our aviation headset accessories collection that A20 owners reorder the most.
Bose A20 Replacement Ear Seals (Aftermarket)
Worn, cracked, or flaking ear seals are the number one reason an older A20 feels louder and less comfortable than it used to. The ANR can only do its job when the passive seal is intact. A fresh set of A20 replacement ear seals restores the acoustic seal and the plush fit in about five minutes, no tools required.
Perfect for any A20 owner whose seals are more than a year or two old.
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Bose Genuine Mic Windscreen Replacement
When the foam windscreen on your boom mic gets worn or soiled, transmission quality deteriorates and ATC starts asking you to say again. This genuine Bose replacement windscreen fits the Aviation Headset X, A20, and A30 boom microphones, and it is the cheapest fix in aviation for scratchy radio calls. It is also basic hygiene if you share the headset.
Perfect for restoring mic clarity on any Bose aviation headset, A20 included.
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Bose 6-Pin to Dual GA Plug Adapter
Own a panel-powered LEMO A20 but need to fly a rental or club aircraft with standard twin jacks? The genuine Bose 6-pin to dual GA adapter converts the 6-pin LEMO panel connector to standard dual GA plugs in seconds, no tools required, so your LEMO A20 (or A30) is no longer chained to one airplane.
Perfect for LEMO A20 owners who also fly rentals, club aircraft, or anything with twin jacks.
Click for Price →Frequently Asked Questions
- Is the Bose A20 still available to buy new?
- No. Bose officially discontinued the A20 in 2023 when it launched the A30, and authorized dealers no longer receive new stock. Any A20 you find today is used, open-box, or leftover old inventory, so check its condition and service history before you pay. The good news is that Bose continues to service the A20 and replacement parts remain easy to find, so existing owners are not stranded. If you are buying your primary headset today, start with the current Bose A30 instead.
- Is a used Bose A20 still worth buying in 2026?
- Often yes, at the right price and condition. The A20 remains an excellent ANR headset, and Bose still services it, so a clean used unit can be a smart buy as a second headset, a passenger headset, or a budget path into premium noise reduction. Inspect the ear seals, head pad, cable jacket, mic windscreen, and battery box for wear and corrosion, and confirm whether the unit has Bluetooth, because Bose sold Bluetooth and non-Bluetooth versions throughout the A20's production run. If it will be your primary headset for years of flying, the newer A30 buys you current production, a full factory warranty, and lighter clamping force.
- Does Bose still support and service the A20?
- Yes. Bose continues to provide service, repairs, and replacement parts for the A20 Aviation Headset and honors existing warranties. Consumable parts like ear seals, head pads, and mic windscreens are still widely available, so routine refurbishment is cheap and easy. Out-of-warranty repairs go through Bose aviation support, which can also confirm a used unit's service history from its serial number. That long support tail is a big part of why used A20s hold their value so well.
- What is the difference between the Bose A20 and the Bose A30?
- The A30 is the A20's direct replacement and improves it in three main areas. Clamping force drops about 20 percent, which you feel on long cross-countries. Active noise cancellation gains three selectable modes instead of one fixed level. The down cable becomes toolless and side-swappable, so you can move the boom mic to either side without a service visit. The A30 also carries the FAA TSO certification, Bluetooth audio, and 5-year warranty pilots expected from the A20. Overall noise reduction stays at the same benchmark level rather than taking a dramatic leap, which is why most A20 owners who upgrade do it for comfort rather than audio.
- Can I still get replacement ear seals and parts for my A20?
- Yes. Ear seals, head pads, mic windscreens, and cable adapters for the A20 are all still in production and easy to order. Worn ear seals are the single most common reason an older A20 feels loud and uncomfortable, and a fresh set such as the Bose A20 Replacement Ear Seals restores both the acoustic seal and the plush fit in about five minutes. Plan on replacing seals and windscreens roughly every 12 to 18 months of regular flying, sooner if you fly in hot climates or share the headset.
- My panel is wired for a LEMO A20. Will the A30 plug straight in?
- Yes. The 6-pin LEMO panel-power connector carries over unchanged, so the LEMO version of the Bose A30 plugs into the same panel jack your A20 used and draws ship's power exactly the same way, with no rewiring required. The reverse flexibility also exists: a LEMO headset can fly in standard twin-jack aircraft using Bose's 6-pin to dual GA adapter. The dual GA and U174 helicopter versions likewise match the A20's connector options one for one, so every A20 installation has a direct A30 equivalent.
- Does the Bose A30 have Bluetooth for ForeFlight and music?
- Yes. Every A30 configuration we carry includes Bluetooth audio and communications, so you can pair a tablet or phone for ForeFlight alerts, music, and phone calls. An audio prioritization setting lets you choose whether Bluetooth audio mutes or mixes when intercom and radio traffic comes through, the same mute-or-mix logic A20 pilots already know from the control module. That makes the transition from an A20 essentially seamless: your EFB workflow carries straight over.
About the author: Neil S. Glazer is a commercial pilot with multi-engine and instrument ratings and the founder of PilotMall.com, where he has helped pilots outfit their aircraft and flight bags for over two decades.
