I was about to get my hands on a pair of second hand DT1350 (with more recent serial number). I have one already, and I bought one for my girlfriend as well.
I realized the sound and small features of the second hand DT1350 are different from mine and my gfs.
I dont think I would want to open them up to compare. I will take photos of the difference in their appearance. Once I got home today.
The sonic differences are quite subtle as well.
Anyone got any ideas of why they might be so different?
EDIT***
Newer Serial: 138xx
Older Serial: 110xx
Appearance Differences:
Sonic Differences:
The most obvious difference I can tell is the impact of the mid bass and its quantity. The newer one has got much dominant mid bass for some reason.
Everyones first impression of the DT1350 vs HD25 will be the difference in bass impact. For some reason, the newer one has got the similiar impact, maybe not quite to the HD25 but definitely better than my older one.
With that mid bass bump, to my ears, there are some trade off with the treble.
The newer version sounds more airy but a bit muffled when the mid bass gets out of hands.