Anyone got experience with portable headphone amplifiers?

Looking for one to power Grado RS-1's. Source is a iriver H140. What do you
think are suitable & adequate headphone amps?

Standard cmoy? £30
Aphead 47? £60
PPA?
Pimeta? Seen one for $225 (dual PP3 + mains adaptor input)
http://homepage.mac.com/skatsaounis/...udio/index.htm

I would need a amp with 1/4" output jack, and ideally support for
rechargeable (so enough cells to meet upto correct voltage)

ta

"Nath" wrote in message
...
Anyone got experience with portable headphone amplifiers?

Looking for one to power Grado RS-1's. Source is a iriver H140. What do
you
think are suitable & adequate headphone amps?
snip
I would need a amp with 1/4" output jack, and ideally support for
rechargeable (so enough cells to meet upto correct voltage)
ta

I'm using the "Headbanger" from Sound Professionals, but it only has a 3.5mm
stereo output socket. Very pleased with it.

--
M Stewart
Milton Keynes, UK
http://www.megalith.freeserve.co.uk/oddimage.htm