DenonTrue wireless earbuds
Denon AH-C840NCW
Denon AH-C840NCW is a true wireless earbuds released in April 2025. Key specs: fit In-ear, active noise cancelling, battery life 10 h, Bluetooth version 5.3.
6.7Score
Noise control & calls5.2
Battery6.9
Connectivity4.9
Build & features4.8
price range$95–120Reference price converted from JPY
- Released
- April 2025
- Brand
Denon- Popularity
- #1,149 of 2,581
In-earFit
YesActive noise cancelling
10 hBattery life
5.3Bluetooth version
IPx4Water resistance (IPx)
YesMultipoint (two devices)
Spec guide
How it ranks among true wireless earbuds of 2025
Battery life · 10 hBottom 44%Bluetooth version · 5.3Bottom 42%Water resistance (IPx) · IPx4Bottom 25%
Compared with true wireless earbuds released in 2025. Bars show the share of models it beats.
compared with other true wireless earbuds
Why is AH-C840NCW a good choice?
Battery life: 10 hbetter than 73% of true wireless earbuds
Driver size: 12 mmbetter than 79% of true wireless earbuds
Weak points
Water resistance (IPx): IPx4worse than 99% of true wireless earbuds
Specifications
Full specifications
Sound
- Ear cup design
- Closed-back
- Driver size
- 12 mm
- Hi-Res Audio
- Yes
- Adjustable equaliser
- Yes
Noise control
- Active noise cancelling
- Yes
- Transparency / ambient mode
- Yes
- Microphones
- 2
Battery & charging
- Battery life
- 10 h
- Battery life with ANC
- 7 h
- Total with charging case
- 35 h
- Charging time
- 2 h
- Quick charge (claimed)
- 5 min → 1 h
- Fast charging support
- Yes
- Wireless charging (case)
- Yes
Connectivity
- Wireless
- Yes
- Hi-res codec (LDAC / aptX HD / LHDC)
- No
- aptX
- No
- LDAC
- No
- Multipoint (two devices)
- Yes
- LE Audio
- Yes
- USB-C
- Yes
Smart & streaming
- Companion app
- Yes
Design & build
- Earbud weight (each)
- 5 g
- Protection rating
- IPX4
- Water resistance (IPx)
- IPx4
Features
- Touch controls
- Yes
- Hands-free calls
- Yes
Specs are collected from manufacturers and open databases and normalised to one format; check details with the seller before you buy.
In collections
Headphones & speakers: Active noise cancelling + wireless charging (case)104Headphones & speakers: Transparency / ambient mode + wireless charging (case)106Headphones & speakers: Multipoint (two devices) + wireless charging (case)113True wireless earbuds: Transparency / ambient mode323Headphones & speakers: Transparency / ambient mode + multipoint (two devices)324True wireless earbuds: Multipoint (two devices)362Headphones & speakers: Active noise cancelling + multipoint (two devices)375True wireless earbuds: Active noise cancelling391
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