I fixed the problem with the bass. Nightcrawler PMed me a suggestion about insertion. I had the small tips on for maximum comfort. However using the medium tips sits them a bit shallower and the sound is more what I remember it -- bass not so overwhelming but the highs a bit more recessed as a result.
I'll run pink noise through them overnight and see if I get any changes. My usual experience with burn-in has been a reduction in harshness, both with headphones and electronics, with the odd exception.
By the way, I emailed Craig at kuboTEN (he lives down the road from me, literally) to check if he is in town for this holiday season and he is, so I told him about the JVCs if any of you would like to order through a fellow Head-Fier.
I'll run pink noise through them overnight and see if I get any changes. My usual experience with burn-in has been a reduction in harshness, both with headphones and electronics, with the odd exception.
By the way, I emailed Craig at kuboTEN (he lives down the road from me, literally) to check if he is in town for this holiday season and he is, so I told him about the JVCs if any of you would like to order through a fellow Head-Fier.