Originally Posted by reddragon
i see... what amp are you driving it with?
ATH designed special amp for them AT-HA5000 that supposed to pair extremely well, I haven't heard that one myself but feedback is very positive.
I liked them with original GS-1, but new modules from Justin (Dynalo+, same that go into new GS-X MK II) brought them to another level by adding extra weight.
You may want to look at W5000 Owners' Amp Registry thread, it has quite a few options that people liked listed.
For proper fit 90% of people need to bend the headband to increase clamping force and in order to create the required seal, rotate cups slightly forward after putting phones on, so earpads "lock" around ears. Bizkid posted that hint he learned from L3000 manual.
The seam on the pad should be aligned with the cup mounting screw on front (for most people), this is stock orientation, but you can also experiment with rotating earpads as well, they just spin around, to find the best position.