Try this:
http://www.radioshack.com/product.as...5Fid=33%2D1109

Hardly the last word in sound quality, but more than fits your specs. I
found it quite listenable with my Zen and 580's.

And these
http://www.radioshack.com/product.as...5Fid=33%2D1222
sound way better than they have a right to at $20!



"Larry R Harrison Jr" wrote in message
news:G0lyd.2$CH5.1@fed1read01...
I have a pair of headphones and they don't get quite loud enough for my
tastes when connected to my MP3 player. I'm wondering if there is an
affordable device which can be connected in-line to the 1/8" headphone jack
which will amplify the sound at little or no quality loss--and isn't huge.

LRH