QUOTE(awyongcarl @ Mar 22 2011, 05:31 AM)
No idea.
Frankly speaking, if you are really thinking of using K702 on-the-go, think AGAIN.
First thing you want to consider is the size, it's humongous and you will look like a retard wearing it outdoor.
Unless..well you wanted to look like one..by all means.
Then, we move to the portable amp..I'd recommend you Headstage : The Arrow.
Here's a detailed and thorough review about it.
http://www.headfonia.com/headstage-the-arrow-amplifier/Its price is 299USD (Even after adding shipping and taxes, it's still within your budget)
So..yes, if you want a portable amp that can drive K702..I'm pretty sure there are other options.
Also, it's worth mentioning that K702 is definitely NOT a low volume headphone. Meaning, you will lose out a lot of detail if you don't crank the volume considerably high.
Honestly..Using K702 on-the-go doesn't make sense.
It's basically 2 speakers on your ear, meaning anyone 5-10 feet (or more) around you will be able to listen what you are listening.
If I'm 10 feet around you..I'd probably tell you to turn your music/song off because it annoys the eff outta me. Just sayin'
QUOTE(Quazacolt @ Mar 22 2011, 07:31 AM)
^
this. if you're buying a K702, you're pretty much forgoing portability. forget about it.
=edit=
to add, sound leakage from the headphones, or carrying DAP/amps/buncha dangling cables etc around you.
not something most people would be walking around with
Haha, alright then the k702 will stays at home lah
QUOTE(E1 - AKG @ Mar 22 2011, 08:40 AM)
tis is akg's portable flagship ... d q460 ...

Oh, cool. Price?