Tried an impedance adapter on the Custom Series headphones? I was kind of disappointed in my Custom-1s until I tried an impedance adapter that I threw together, but then everything just fell into place. It seems like these are actually pretty good, just too sensitive to give the full spectrum at a reasonable volume. I'm going to add this to my
impressions thread, and I'll probably be getting a quality impedance adapter to use from now on. (I'm not going to show you mine, but I will say it involved alligator clips instead of solder in some parts)