I've only just now tried them out. Tested on "Whole Lotta Love" and "21st Century Schizoid Man" (@256 kbps) to see how the bass & stereo responded. T'was quite good, but after those 10-12 minutes I had the uncomfortable "ear squeeze" and had to take a break. The metal adjustment thingies might alleviate that. Now on to my real favorite - Beethoven...darn - not sounding as crisp as I'd prefer. Adjusting the head squeeze pressure did help a bit. If only I could find a replacement for the JVC HA-D700 ones I sat on, I would be happy. Great sound and I could wear them all day long.