For what it is worth I hadn't listened to the Stax SR-404 signatures in quite a while. I have been using my modded TF-10's (iem) mostly and have been very satisfied. I plugged the Stax in last night and let them "charge" overnight.
I was shocked how different the Stax sound compared to the iem's I am going to have to listen for awhile to tell exactly where but gosh they sound great!
Absence truly does make the heart grow fonder!