IO-4
Wireless closed-back over-ear Hi-Fi headphones with 50 mm paper fibre drivers, memory foam ear pads and up to 60 hours of battery playback. Aimed at listeners who want a long-lasting Bluetooth headphone that can also be used wired. Now listed as discontinued.
- 50 mm free-edge paper fibre cone driver
- Closed-back, circumaural (over-ear) design
- Up to 60 hours of battery playback
- Bluetooth 5.0 with AAC, aptX and aptX HD
- USB-C and 3.5 mm mini-jack inputs
- Memory foam ear pads; passive mode when battery is empty
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The IO-4 is a closed-back, circumaural headphone built around a custom 50 mm driver with a free-edge paper fibre cone and an optimised neodymium magnet system. The design aims at low distortion, minimal colouration and accurate dynamics across the frequency range, and it uses the same design approach as the maker's loudspeakers.
The ear pads are memory foam that moulds to the head for comfort on long sessions and a consistent seal. The lithium-ion battery gives up to 60 hours of playback and recharges in about 2.5 hours. Battery-level LEDs and voice prompts show the remaining charge, and when the battery is empty the headphones can still be used in passive mode.
For connection, the IO-4 supports Bluetooth 5.0 with AAC, aptX and aptX HD. A USB-C connector and a 3.5 mm mini-jack input are available for wired use. The ear pads are designed to be replaced by the user, and a travel case is sold separately.
Myndband
Tækniupplýsingar
- Framleiðandi
- DALI
- Líkan
- IO-4
- Flokkur
- Heyrnartól
Audio
- Headphone principle
- Closed back circumaural (over ear)
- Full range driver
- 50 mm free-edge paper fibre cone
- Frequency range [+/- 3 dB]
- 10 - 20,000 Hz
- Nominal impedance
- 25 ohms
Connectivity
- Connection input
- Bluetooth® 5.0, 3.5 mm mini Jack, USB-C
- Wireless input
- Bluetooth® 5.0, AAC™, aptX™, aptX™ HD
- Wired connectors
- USB-C, 3.5 mm mini-jack
Power
- Battery playback time
- Up to 60 hours
- Battery charge time
- 2 ½ hours
- Battery type
- Lithium-ion
- Battery indication
- Battery level LEDs and voice prompt
Physical
- Ear pad material
- Memory foam
- Ear pads
- User-replaceable
- Finish
- Chalk White
- Magnet system
- Optimised neodymium
- Diaphragm size
- 50 mm
Software
- Supported codecs
- AAC, aptX, aptX HD