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Estimated price (community-sourced)
About the IO4
The DALI IO-4 is a closed-back, over-ear wireless headphone designed and engineered in Denmark for natural, transparent sound. It uses DALI’s custom 50 mm paper-fibre cone driver, supports Bluetooth 5.0 with aptX, aptX HD, and AAC, and also offers wired listening via 3.5 mm mini-jack or USB-C. The IO-4 is built for long listening sessions with up to 60 hours of battery life, quick 2.5-hour charging, passive wired playback when powered off, and IP53 protection.
Specifications
Key Specifications
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