Just thought I would give an update regarding my situation, because I think I found out why the DT770 32 ohms don't suit me personally. I think the problem is my biggish ears, which also stick out a bit. I think they must have been cupping/blocking the driver somewhat, affecting the air volume. I found through trial and error that if I positioned the pads so that they pinned the tips of my ears back, the bass was humongous (actually, too much for me!). This was not practical or comfortable though. I think this explains why I have no issue with other Beyerdynamic open style headphones. They did break in somewhat, and the wooshing/resonance problem was reduced. Most of the time it was okay, but it seemed to get worse as the volume of my surrounding environment increased, which was predominantly me sitting on the train. The wind however was always an issue, as it would blow into the little vent hole and make all sorts of noise. It was tough to listen to them in such conditions. Otherwise, I always found the bass was present, but lacking. I tried them on my desktop amp, and there was little difference. I do like the mids, treble, and sound stage though, which all have that similar signature to my DT880's. So I ended up giving them away for xmas. My niece had used them a few times at my house, and commented how much better they sounded compared to her current headphones, which were a basic model of a reputable company (Shure I think - was years ago I purchased them for her). So whilst she isn't the best critic, it did help reinforce my answer to my problems. So I'm on the hunt for some new headphones. I have patience, so I will keep watching various classifieds for a good used bargain. I wouldn't mind stepping up into the higher level Beyer's, but I've also got my eye on the various models of the AKG K7** series. I'm also contemplating upgrading my X3 to something that can comfortably run 250ohms headphones. That would open up my options. Saying that though, I did just place an order for some Massdrop HIFIMAN HE4XX Planar Magnetic Headphones, because they were on special, and I got a sign-up coupon, so it seemed like a good deal, and I'm keen to try them out.