Maybe someone screwed up the EQ settings of the BB setup. I used my own device and heard nice, tight and ample bass with balanced mids and highs. The bass is definitely emphasised, but is nice, plump, natural and pleasant. It was good enough to beat out the sennheiser PX 360 i also had a listen to.
I use their sound source and my iPhone 5, same problem. I wanted to try the Sony MDR1 as well, but the whole Sony section was broken. Meanwhile the beats area was up and going. I swear they put some type of signal processing at the beats kiosk. I guess BB has their priorities.
Are you sure you were getting a good fit with the m80s? Thats what seems to be the issue.
Yeah. Sometimes it takes a bit of fussing, but not real issues getting a tight seal with the M80.
I singled out a quote from one of the threads that highlights the M40:
But bottom line, I immediately purchased the ATH-M40fs, and they sound terrific.