No, here's the real newbie post (post #1). I actually have a lot of experience with the Proline 750s, though, since I use them with my home studio here (I needed a headphone with enough of a seal to keep the click track off the piano microphone over my head when I do piano scratch tracks, and of high enough quality to do rough mixing through them). I didn't really buy them for music listening since I already had AKG K1000s (which I love!) and AKG K500s from right before they discontinued them, but I started running them straight out of the speaker posts of an Decware EL34 amp wired in triode (3.5 watts) and the sound is pretty amazing. I actually used them for a couple of months before I brought my K1000s down to my parents' farm from my apartment up in Atlanta where my real stereo is, and I found them thoroughly satisfactory and non-fatiguing even when listening for long periods while I took notes for my dissertation. I love the super out-of-the-head AKG K1000 thing, but I could actually imagine people wanting more slam and punch and preferring the Proline.
And to answer the question, I haven't found unusual treble or brightness at any sane volumes either from the headphone amp on the recorder, the headphone jack from an old Arcam Alpha 8 amp that I use sometimes, or the Decware amp (and the latter two were fed by an Arcam 7SE cd player, which is not so refined compared to my real cd playback systen up in Atlanta and thus might impart more glare to the sound). I think I prefer open cans for classical and small-group jazz since there's a certain delicacy and feathery edge to things that the 750s sometimes lack, but the 750s are very refined and wonderful sounding.
So to make a presumptuous an overly-long first post longer, I just plugged the 750s in to check. On a variety of tracks, everything from Nat King Cole and George Shearing to Broken Spindles, the 750s did present extra treble at volumes well above my normal listening levels, and I think above any safe and expected levels. At more normal volumes, the 750s reminded me again why I found them so appealing before--lots of detail, but not in a harsh, forward sort of way, great bass, and an overall very coherent presentation (Nat King Cole's voice sounds extra creamy and velvety).
So in a short conclusion in case you skipped to the end, I think you're safe on the treble thing, and put my vote as a definite supporter of the 750s.
Robert
