Image © DenonDenon AH-C840NCW
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At a glance
- Brand
- Denon
- Type
- True Wireless
- Fit
- -
- Connection
- Wireless
- Noise cancelling
- Yes
- Released
- 2025
The AH-C840NCW are true wireless earbuds with adaptive hybrid noise cancelling, IPX4 water resistance, and up to 35 hours of total battery life with the case. They feature Bluetooth 5.3 with LE Audio and Auracast support, and are tuned with Denon's signature sound.
The HearWiki takeAI-condensed
The Denon AH-C840NCW true wireless earbuds combine adaptive hybrid noise cancellation with a 12mm dynamic driver for a rich, signature sound. They offer a robust feature set including Bluetooth 5.3, multipoint connectivity, a transparency mode, wireless charging, and an IPX4 rating for sweat and splash resistance. With up to 10 hours of playback on a single charge and 35 hours total with the case, these earbuds are built for extended listening sessions.
What works
- Adaptive hybrid ANC effectively reduces ambient noise
- Comfortable 5.1g earbud weight with IPX4 water resistance
- Wireless charging case and quick charge feature for convenience
- Custom EQ and app support for personalized sound
What doesn't
- Battery life drops to 7 hours with ANC enabled
- No mention of high-resolution audio codecs like LDAC or aptX
- Touch controls may require a learning curve
- Case adds 54g to carry, slightly bulky for some users
Paraphrased from published reviews & specs - not an original hands-on test. Our AI disclosure.
Specifications
| Driver | 12 mm dynamic |
|---|---|
| Driver type | dynamic |
| Driver size | 12 mm |
Audio
| Driver | 12 mm dynamic |
|---|---|
| Driver type | dynamic |
| Driver size | 12 mm |
Wireless
| Bluetooth | 5.3 |
|---|---|
| Codecs | SBC, AAC, LC3 |
| Multipoint pairing | Yes |
Battery
| Battery life | 10 h |
|---|---|
| Battery life (ANC on) | 7 h |
| Battery incl. case | 35 h |
| Full charge time | 120 min |
| Quick charge | 5 min → 1 h |
| Wireless charging | Yes |
Features
| Active noise cancelling | Yes |
|---|---|
| ANC type | adaptive |
| Transparency mode | Yes |
| Companion app | Yes |
| Custom EQ | Yes |
| Controls | touch |
Design
| Weight | 5.1 g |
|---|---|
| Case weight | 54 g |
| Water resistance | IPX4 |
Calls
| Microphones | 2 |
|---|
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