Dali IO-8 headphones ZDNET's key takeaways The Dali IO-8 headphones are available on Amazon for $1,250. Once they had everything dialed in, the owner would play "Tricycle" to see how it sounded. Also: These Beyerdynamic headphones deliver premium and rich sound while undercutting the competitionThe IO-8 headphones have two modes: bass and hi-fi. The IO-8 headphones played every song and genre as if they were built specifically for each one. ZDNET's buying adviceThe Dali IO-8 headphones are expensive, no doubt.