I don't have a portable amp because I tend not to listen much on-the-go. But I
do need a
transportable system, since I like to listen at work as well as at home. My solution was to use a no-longer-needed laptop computer bag. The bag was custom designed for an iBook, so it's fairly compact. My Prehead fits in the laptop space relatively nicely, and there are a variety of pockets that accomodate my cables and iPod with room to spare.
Now, if I could just find a good case for my headphones! I almost bought one from Headroom but a friend beat me to it...and I'm glad he saved me the trouble. From the side, the thing is narrow at the top and wide at the bottom...just like the headphones. The problem is that the bag also opens with a zipper on the top. So I have to squeeze the big earpieces of my headphones (Beyer 880s, Senn 650s, AKG 501s) past the zipper at the narrow top of the bag. Once they're in, I hate to take them out. And once they're out, I hate to put them in.
Oh, one other problem: when the phones are in the bag, all of their weight is on the cable connection(s) at the bottom of the earcup.
So, what do you guys use to transport full-size headphones? This is probably more appropriate as a separate thread, even though I didn't start out that way...sorry!
macdane