This was my findings as well. With a truly balanced DAC into the BHA-1 and using the XLR out of the BHA-1 I got much better results from all the headphones I used. At the time the only headphone that was not Balanced was the T!. It sounded horrible. I got it re cabled to a 4pin XLR, put it back on the BHA-1 - Bingo. The T1's was great.