David Clark H10-56HX Headset Parts Guide & Illustrated Catalog

The David Clark H10-56HX is a versatile aviation headset designed for pilots who demand clear communication and comfort during flight. Its defining feature is the hybrid boom with an M-7A electret noise-cancelling microphone, which ensures that your voice is transmitted clearly even in noisy cockpit environments. This feature is particularly beneficial for pilots flying in high-noise settings, such as helicopters or older aircraft, where ambient noise can interfere with communication.

One of the practical advantages of the H10-56HX is its compatibility with a wide range of aircraft, thanks to its overhead cord kit. This makes it an excellent choice for pilots who fly multiple aircraft types and need a reliable headset that adapts to different cockpit configurations. The headset's circumaural design, combined with undercut gel earseals, provides passive noise reduction, enhancing comfort and focus during long flights.

This guide covers everything you need to know about the H10-56HX, from its technical specifications and noise attenuation capabilities to a detailed parts catalog and maintenance tips. Whether you're looking to replace a worn-out part or upgrade your headset's comfort, this guide will help you keep your H10-56HX in top condition.

• Hybrid boom with M-7A electret microphone for superior noise-cancelling performance.
• Compatible with various aircraft due to its versatile overhead cord kit.
• Undercut gel earseals provide enhanced comfort and noise isolation.
• Robust construction ensures durability in demanding cockpit environments.
• Shares many parts with other H10 series headsets, simplifying maintenance.
• Passive noise reduction through circumaural ear cups for quieter flights.
• Lightweight design reduces fatigue during long flights.
• Available comfort upgrades enhance long-term wearability.

• Model Number: H10-56HX
• Part Number: 19521P-38
• Microphone: M-7A Electret Noise-Cancelling
• Design: Circumaural
• Passive Noise Reduction Rating (NRR): 23 dB

The H10-56HX achieves its noise reduction through passive means, utilizing circumaural ear cups that create a sealed acoustic chamber around the ears. The headset's design includes robust dome shells that maintain their shape under clamping forces, ensuring consistent noise isolation. The undercut gel earseals further enhance this by providing a snug fit that blocks external noise effectively.

Over time, the effectiveness of noise attenuation can diminish if the ear seals become compressed or damaged. This can lead to increased cockpit noise levels, which may affect communication clarity. To maintain optimal noise reduction, it's advisable to replace the ear seals regularly. The recommended replacement part is the Undercut Gel Earseal (pair, part number 40863G-02), which is item 10 in the official parts catalog for this model.

The David Clark H10-56HX and H10-66 are both high-quality aviation headsets, but they cater to slightly different needs. The H10-56HX is designed with a hybrid boom and M-7A electret microphone, making it ideal for environments where noise cancellation is crucial. In contrast, the H10-66 is a dual impedance headset, which offers flexibility for pilots who switch between different aircraft systems.

In terms of parts compatibility, both models share several components, such as ear seals and headband springs, which simplifies maintenance and repairs. However, the H10-66's dual impedance feature requires specific components not found in the H10-56HX. This means that while some parts are interchangeable, others are model-specific.

Key Differences:

• Microphone: H10-56HX uses an M-7A electret microphone, while H10-66 supports dual impedance.
• Impedance: H10-56HX is single impedance, whereas H10-66 offers dual impedance.
• Parts Compatibility: Shared components include ear seals and headband springs, but some parts are unique to each model.

👉 If you need a headset with robust noise cancellation and a reliable microphone, the H10-56HX is an excellent choice. For pilots requiring dual impedance capabilities, the H10-66 may be more suitable.

David Clark H10-56HX Parts List

1. Retaining Ring (10/pk) — 00009M-03
2. Headpad Restraint, Foam — 40266G-01
3. Right Dome — 11353P-49
4. Filter, Outer, Yellow (1 each) — 15511P-02
5. Module with Bracket — 15507P-10
6. Screws (10/pk) — 13180P-03
7. Filter, Middle, Charcoal (1 each) — 15510P-04
8. Filter, Inner (1 each) — 15509P-02
9. Filter (Left) — 15512P-03
10. Undercut Gel Earseal (pair) — 40863G-02
11. Overhead Cord Kit — 22607G-12
12. Headband Spring — 15093P-01
13. Headpad Assembly — 18900G-45
14. Stirrup & Clamp Kit — 22378G-12
15. Volume Control — 09349P-40
16. Boom Guide Kit (Detented) — 12840G-09
17. Hybrid Boom with Cord — 18740G-05
18. M-7A Electret Mic — 09168P-33
19. Mic Protector w/ O-Ring — 40062G-02
20. Clip, Cord (4/pk) — 15125P-02
21. Left Dome — 11353P-50
22. Comm Cord Kit — 40599G-04

Looking to make your David Clark H10-56HX even more comfortable? These two upgrades are customer favorites:

• Regularly inspect the undercut gel earseals (part number 40863G-02) for signs of wear or damage, as they are crucial for effective noise reduction.
• Check the condition of the headpad assembly (part number 18900G-45) and replace it if it becomes compressed or uncomfortable.
• Ensure the hybrid boom with cord (part number 18740G-05) is securely attached and free from damage to maintain clear communication.
• Clean the microphone protector regularly to prevent dust buildup, which can affect audio quality.
• Store the headset in a protective case when not in use to prevent accidental damage.

By following these maintenance tips, you can ensure your H10-56HX remains in excellent condition for years to come.

Enhance your David Clark H10-56HX with these essential adapters, ensuring compatibility with various aircraft systems:

Complete your David Clark H10-56HX setup with these essential accessories: