Abyss AB-1266 Phi, the headphone of Olympus. In the latest TC (Total Consciousness) version, it even surpasses its previously unmatched predecessors. The original Abyss set a new standard for high-quality craftsmanship and audiophile sound in the over-ear headphone category. Tactile far removed from any expensive plastic product for the mass market, the giant continues this claim and remains a unique piece. Sonically, the newly developed 66 mm planar magneticspeaker drivers deliver an unmatched resolution. The sound of the Abyss is so realistic and clear that it can be described as surreal. This headphone plays in its own league.