Pros: Nice tonal balance, great mids, soundstaging, imaging, isolation, comfort
Cons: Somewhat recessed bass
This is a truly great closed-back headphone with natural open and airy sound suited perfectly for large orchestras, chamber music, acoustic jazz etc. The isolation is really great both in and out. Compared to similarly priced closed-back ATH-M50 a lot better isolation. DT660 is very easy to drive. It sounds fairly good from an android phone and even better from a computer. The bass is much better when driven by a real headphone amp.