DALI IO-4 Premium Wireless Over-The-Ear Headphone With DALI IO headphones, users benefit from more than 35 years of experience designing some of the finest hi-fi loudspeakers in the world. The DALI IO-4s are designed and engineered by the same team and to the same basic principles as any other DALI loudspeaker. The aim is to create the most natural and authentic sound possible - and to reproduce music exactly as intended by the artist. DALI IO is designed and developed in Denmark - build on custom solutions by DALI. The IOs class-leading cus