On one level, this group test is a contest between two closed-back headphones (Audio-Technica and Denon) and three open-back models (AKC, Grado and Sennheiser), and there's no doubting which configuration wins the day. Unless you really must have a high level of sound isolation in a headphone, then on the evidence of this test closed-back 'phones are to be avoided, since, in the traditional reverse order ranking process, they're the first to pack their bags and leave the house.
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