I've listened to the Triport on several occasions.
 
The first time was memorable - I was convinced that a vandal had damaged the drivers of the display unit.  Surely, they could not sound this bad.
 
So I went to another pair at the store.  They sounded just as bad as the first.  So were the third and fourth pairs.  I wasn't expecting anything great from Bose, but was surprised at how poor these sounded.  Even the free Buds that come with an iPod sound better.

The Triport is muddy and awful down low.  The mids are recessed and unappealing and the highs are practically non-existent.  There are no good qualities to these headphones.  If you're in the market, buy something else.  There are dozens of other headphones that offer great sound and enjoyment at a lower price.

This is the only pair of headphones I bought that I was never able to warm up to.  The reason for this is that the mids - especially vocals - take on an unnatural, artificial and plasticky sound.  They never sounded true to life and began to grate on me after short listening periods.  They were OK for instrumental music, but even then, the tonality was off in the mids.
 
What's disappointing is that AKG dropped the K-501 and K-1000, and gave us this.  The K-701/2 is nothing like AKG's previous efforts.  I have the K-1000, K-340 and K-240DF, and used to have the K-501.  All of those got the midrange right.  I was expecting to love the K-701 as well, but like I said, the artificial tonality in the mids completely ruined them for me.
 
Strangely, the K-601 sounds halfway decent the times I've listened to it and I remain hopeful that AKG will introduce a model that gets the mids right.  They used to have some of the best mids of any manufacturer.