Sennheiser HD 485 Consumer Headphones

this headphone is comfortable but i notice 2 things about sound :
1/ too much bass in all situations (so sound is warm and pleasant for mid frequencies like voices a but becomes terrible with low frequency sounds
2/ very sensitive to high frequencies ( i had an opera sound were i almost only heard a hi frequency hiss, i know this comes from the old opera recording but none of my other headphones (including my hd280pro) reproduced this hiss at such a high volume)
what is nice is that the cable is 2 male jack at both end so if it get broken it can be replaced with any cable.