It is the breaking in of the phone that makes the difference. A brand new 325 is very bright. The flat pads, because the driver is closer to your ear tame the brightness and increase the bass. After the phone is well broken in the phone is less bright and increases in bass. The flat pads sound dull and muddy to me at this point. Enter the new pads, with a well broken in phone they sound great. Be aware that this may be a minority opinion.
I Just read Jude's post about this being an inappropriate place to post this......please either start a thread in headphones or PM me.
Thanks.
Sorry Jude.