I will do a detailed A/B comparison tonight and then I'll return the 1540 tomorrow. It's just not comfortable enough and so far I overall prefer the sound signature of the 7520 to the 1540. The 1540 does have nice mids and the sound is a bit more laid back, but I don't mind the analytical quality of the 7520. I guess it's partially because I've listened to the Shure SE530 IEM for 4 years and that also has that laid back quality, so I like the contrast with the 7520. The 1540 sounds a lot closer to the SE530 than it does to the 7520. And also given the price of the 1540, I just don't think it's worth it. Still think it's strange the headphone was physically designed the way it was, with that odd shape and angle. The bottom part of the pads get squished against my jaw, whereas the top parts barely touch my head, such a weird angle. Would be better if 1) the cups would extend down further and 2) they could vertically swivel a bit more so that I could actually have them flat against the side of my head, instead of at an angle.
Funny you said that as week ago during my 1540 research I stumbled across this review on amazon. At least you are not alone with that problem.
Quick question on treble, is is harsh and hot as amazon review indicates or severely rolled off like Dale put it in his review, do you agree with him on that assesment
Edited by Andrew_WOT - 12/5/13 at 10:34am