I owned 3 headphones once, the Empyreans, Focal Utopia and Final D8000. I now own two, having sold the Utopias. On my amplifier, the Utopias had a thin, bright sound, no bass. The Empys and Final D8000 destroyed them having a thumping bass , much fuller sound for me. Utopias are too overpriced for what they deliver. Who cares about a beryllium driver.