Abyss AB-1266 PhiABYSS AB 1266 Phi TC Audiophile Reference Headphone Model AB 1266 Phi TC We just can't stop trying to get closer to the music. Introducing the new AB 1266 Phi TC (Total Consciousness). Newly designed 66 mm planar magnetic speaker drivers deliver the highest resolution of any headphone ever made. Combined with the venerable AB 1266 headphone design, newly minted all aluminum frame and posh ear pads means youll never have to buy another concert ticket.