Very well reviewed open back flagship headphones. The Utopia are a fairly efficient headphone relative to other flagship models and and there are many good headphone amps that will do an excellent job with them. Utopia are an open back design, have a spacious sound and do not isolate outside noise.
cnet.com: Focal redefines what it means to be an audiophile headphone
theverge.com: the Utopia headphones live up to their price
theabsolutesound.com: the Focal Utopia certainly ranks overall as the finest dynamic headphone I’ve experienced to date. It is among the most comfortable, sonically neutral, and well-built headphones I’ve ever reviewed.
headphone.guru: They offer truly world class build quality, the most neutral audiophile presentation available and are able to mine the smallest details from your recordings that you never knew existed.
From Focal: Utopia are THE reference high-fidelity headphones manufactured in France by Focal. Utopia are the world’s first audiophile headphones to be equipped with totally open-backed full-range speaker drivers with pure Beryllium ’M’-shaped domes.
40mm Pure Beryllium drivers (actual Beryllium, not coated, ed.) Lambskin headband and earpads, with memory foam earpads, Carbon Fiber yoke, 3m high quality, low impedance cable.