Here's the new edition of the tiny but hi-fi quality B&O Form2i, available in several colors, and replacing the original version which was introduced 25 years ago. My impression is that they improved the bass, although it's not a powerful bass by any means.
http://www.hifiheadphones.co.uk/for...ufsen-b-o-form2i-stereo-headphone-review.html
http://www.hifiheadphones.co.uk/for...ufsen-b-o-form2i-stereo-headphone-review.html