Keep your H10-20 flying strong with our complete breakdown of features, parts, and upgrade options.
The David Clark H10-20 is a dual-plug, fixed-wing passive headset built for pilots who want dependable performance without sacrificing comfort. With a certified Noise Reduction Rating of 24 dB, steel hardware, and the M-7A amplified electret microphone, the H10-20 has been a trusted choice for student pilots, flight instructors, and private owners who log regular hours in the cockpit.
Like every David Clark headset, the H10-20 is built to last — but that durability depends on keeping the right parts in good condition. Ear seals compress with use, overhead cord assemblies absorb flex stress, and microphone booms take regular wear from daily adjustments. Replacing worn components with genuine OEM parts is the most direct way to maintain the audio quality and noise attenuation the H10-20 was designed to deliver.
This guide covers everything you need to know about the David Clark H10-20: full technical specs, a noise attenuation breakdown, a model comparison, and a complete illustrated parts catalog cross-referenced with available product links at Pilots HQ.
The David Clark H10-20 delivers a certified 24 dB NRR — one of the highest passive noise ratings in the dual-GA fixed-wing category.
Powered by the M-7A amplified electret microphone for clear, noise-cancelling voice transmission in high-cockpit-noise environments.
Built with steel hardware and ABS dome construction for long-term durability through daily flight school and private use.
Comfort-focused design includes a super-soft foam head pad, undercut Comfort Gel ear seals, and a low-profile volume control with detent settings.
FAA TSO Approved C57B and C58a, exceeds RTCA/DO-214 standards, and carries a five-year David Clark warranty.
Pilots HQ stocks genuine OEM H10-20 replacement parts — ear seals, boom assemblies, overhead cords, mic elements, and more.
24 dB NRR — Higher passive noise reduction than the H10-13.4 series, making it particularly effective in louder piston-engine cockpits.
M-7A Electret Microphone — David Clark's most advanced noise-cancelling mic element provides clean, intelligible transmissions even in high-ambient-noise environments.
Steel Headband Hardware — Built tougher than lighter composite headsets, the steel construction holds up through years of daily training and cross-country flying.
Undercut Comfort Gel Ear Seals — The contoured gel profile creates a secure acoustic seal without excessive clamping pressure, making the H10-20 more comfortable on longer flights.
Low-Profile Volume Control with Detent Settings — Easy in-flight adjustment that clicks into position, so volume stays where you set it.
Flex Boom Assembly — The adjustable boom positions the M-7A mic precisely at the corner of the mouth, optimizing transmission clarity without touching the lips.
FAA TSO Approved — Certified to C57B and C58a, and exceeds RTCA/DO-214 standards for aviation audio performance.
Five-Year Warranty — Backed by David Clark's industry-leading customer service program.
David Clark H10-20 Specs at a Glance
Model Number: H10-20
Part Number: 40074G-01
Weight (without cord): ~19 oz. (562 g)
Cord: ~5 ft. (1.5 m) straight cord
Earphone Plug: PJ-055 (.25" phone plug)
Mic Plug: PJ-068 (.206" phone plug)
Microphone: M-7A Amplified Electret
Ear Coupling: Around-the-ear (circumaural)
Earphone Type: Dynamic
Ear Impedance: 150Ω (300Ω each, wired in parallel)
Ear Frequency Response: 200–5,500 Hz
Mic Impedance: 50Ω ±20%
Mic Frequency Response: 300 Hz–3.5 kHz per RTCA DO-214
The David Clark H10-20 carries a certified Noise Reduction Rating of 24 dB — placing it at the higher end of passive fixed-wing headsets. That one additional decibel over the H10-13 series may seem small on paper, but in a noisy piston-engine cockpit or flight training environment, it translates to meaningfully reduced ear fatigue on longer legs. The H10-20 is particularly well suited for high-cycle training operations, older aircraft with louder cabin noise, and any pilot who prioritizes passive attenuation as the foundation of their audio setup.
The H10-20's around-the-ear circumaural design is central to its attenuation performance. The undercut Comfort Gel ear seals compress and conform to the contours of the ear, creating a consistent acoustic seal regardless of glasses or headset positioning variations. Steel headband hardware maintains steady clamping force to hold that seal through long flights, and the ABS dome construction adds a secondary layer of sound isolation around the earphone cavity.
What's the difference between the David Clark H10-20 and the H10-30?
Both the H10-20 and the H10-30 are dual-plug, fixed-wing passive headsets in the David Clark lineup, sharing the M-7A microphone, circumaural ear coupling, Comfort Gel ear seals, and a five-year warranty. Both are certified to FAA TSO C57B and C58a standards and are built for everyday general aviation use.
The key difference is construction weight. The H10-20 uses steel hardware and comes in at approximately 19 oz., while the H10-30 is a lighter aluminum-hardware design at roughly 16.5 oz. and carries the same 24 dB NRR. Pilots who prefer a lighter headset often gravitate toward the H10-30, while those who prioritize build ruggedness for high-cycle use tend to prefer the heavier H10-20.
Key comparison:
H10-20 (40074G-01): 24 dB NRR · Steel hardware · ~19 oz. · Built for durability in demanding training environments
H10-30 (12508G-17): 24 dB NRR · Aluminum hardware · ~16.5 oz. · Lighter feel for longer cross-country flights
👉 If you fly frequently and want maximum build toughness, the H10-20 is the stronger choice. If reducing headset weight is the priority, the H10-30 delivers the same NRR at a lighter profile.
Illustrated Parts Catalog for the David Clark H10-20
Comfort Upgrades Worth Considering for Your David Clark H10-20
Looking to make your David Clark H10-20 even more comfortable on longer flights? These two upgrades are customer favorites:
Double-Foam Head Pad Kit (40688G-36):
The H10-20's standard head pad performs well out of the box, but pilots who fly regularly in training environments often notice it compressing over time. The double-foam head pad kit replaces the stock pad with a thicker, dual-layer cushion that distributes the steel headband's clamping pressure more evenly across the top of the head. The result is noticeably reduced pressure during back-to-back flights and extended cross-country legs.
👉 A straightforward swap that makes a genuine difference in long-session comfort.
Comfort-Gel Undercut Ear Seals (40863G-02):
The H10-20 ships with Comfort Gel ear seals as standard equipment, which is a genuine advantage over some competing headsets at this price point. However, ear seals compress and harden with use — typically within 6 to 12 months of regular flying. Replacing them with a fresh pair of 40863G-02 Comfort-Gel Undercut Ear Seals restores the acoustic seal and the soft, conforming fit that protects both comfort and the headset's full 24 dB NRR. This is also the most impactful single maintenance item for long-flight wearability.
👉 If your H10-20 feels harder against the ears than it once did, fresh ear seals are the first thing to replace.
How to Keep Your David Clark H10-20 Performing Like New
Replace ear seals every 6–12 months depending on flight frequency — compressed or hardened seals reduce both comfort and noise attenuation.
Inspect the headband spring periodically; a weakened spring reduces clamping force and allows the acoustic seal to break during flight.
Swap out the headpad assembly if it becomes compressed or uneven — the steel headband transmits more pressure to the skull when the pad loses thickness.
Check the overhead cord assembly and comm cord for cracking, kinking, or intermittent audio — these are the most common points of electrical failure on high-use headsets.
Keep the boom assembly and mic protector clean and properly seated; a loose or dirty mic protector degrades transmission quality even when all other components are functioning correctly.
Wipe down headset surfaces after each flight with mild, aviation-safe wipes to remove sweat and skin oils that accelerate seal and pad degradation.
Store the H10-20 in a protective bag or hard case between flights to prevent dome and cord damage.
Pilots who stay ahead of ear seal and head pad replacement consistently get more years of reliable performance from their David Clark H10-20 — and avoid mid-flight audio problems that stem from gradual component wear.
Keep Your David Clark H10-20 Connected
The David Clark H10-20 ships with standard dual fixed-wing GA plugs — a PJ-055 earphone plug and a PJ-068 mic plug — compatible with the vast majority of general aviation aircraft audio panels. If you fly multiple aircraft types or need to adapt the H10-20 for a helicopter or different panel configuration, David Clark offers a straightforward set of adapter options.
GA to Helicopter Adapter (18253G-06): Converts the H10-20's dual PJ-055/PJ-068 plugs to a single U-174/U connector for helicopter operations.
Airbus Aviation Headset Adapter (PA-97): Adapts standard GA plugs for use with Airbus-style 6-pin aircraft audio systems.
GA Headset to Bose Plug Adapter (PA-93B): Connects the H10-20 to panels wired for Bose-style single plug configurations — useful in some newer general aviation aircraft.
👉 A single adapter is usually all it takes to fly the H10-20 in a different aircraft type — no need to swap headsets.
Accessories to Protect and Maintain Your Headset
Small accessories make a big difference in headset longevity and comfort.
Genuine David Clark Parts, Fast Shipping
At Pilots HQ, we believe our job isn't finished when you buy a headset. We go further by offering:
Expert Education: Guides, blogs, and resources that explain how to care for and get the most from your David Clark H10-20, including maintenance tips and parts breakdowns.
Maintenance Reminders: Helpful tips on when to replace ear seals, cords, and head pads to keep your H10-20 comfortable, reliable, and ready for every flight.
Trusted Inventory: Only genuine David Clark headsets, adapters, and replacement parts — no imitations.
Fast, Reliable Shipping: Get what you need quickly, so your flying isn't delayed by missing parts.
Pilot-Focused Service: Our team understands aviation and is here to help you choose the right headset, adapter, or replacement component for your aircraft and mission.
👉 With Pilots HQ, you're not just buying products — you're investing in long-term comfort, clear communication, and confidence every time you fly.
How often should I replace the ear seals on my David Clark H10-20?
Every 6–12 months under regular use, or sooner if the seals feel hard, cracked, or no longer conform to the shape of your ears. The OEM replacement is the Comfort-Gel Undercut Ear Seals (40863G-02), which restore both comfort and the full 24 dB NRR the H10-20 is rated for.
What is the part number for the H10-20 boom assembly replacement?
The dedicated flex boom replacement for the H10-20 is the Boom Assembly Kit (41090G-12), available at Pilots HQ. The boom attachment hardware is 12840G-19. These two components together cover a complete boom replacement.
Is the David Clark H10-20 FAA certified?
Yes. The H10-20 is FAA TSO Approved to C57B and C58a standards and exceeds RTCA/DO-214 requirements. It carries NSN 5965-01-446-1475 and is covered by a five-year David Clark warranty.
What's the difference between the H10-20 and the H10-21?
The H10-20 (40074G-01) comes with a 5-foot straight cord and dual fixed-wing GA plugs. The H10-21 (40074G-03) uses a 5-foot extended coil cord with the same dual plugs — otherwise the two headsets are identical in construction, NRR, and microphone.
Can I use the David Clark H10-20 in a helicopter?
The H10-20 ships with dual PJ-055/PJ-068 fixed-wing plugs and is designed for general aviation fixed-wing operations. To use it in a helicopter, you'll need a GA-to-Helicopter adapter (18253G-06) to convert to a U-174/U single plug.
What overhead cord assembly does the H10-20 use?
The H10-20 uses Overhead Cord Assembly 22607G-01. This is the internal wiring that runs through the headband from one earcup to the other and is one of the first components to check if you're experiencing intermittent audio in one ear.
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