So I've been having problems with my Music Streamer II lately. When I have it set up as MacBook Pro -> MSII -> O2 -> headphones, I experience problems. Sometimes it will completely stop working (leds go out, not recognized by the computer at all) until I unplug the USB cable and replug it.  Then...

Hello Head-Fi,   I'm looking to upgrade my headphone setup. Right now I've got a set of AKG K171 Mkii 'phones (which are 55 ohm) going straight from my computer. I use the FiiO E6 for my iPod. I am looking for a headphone amp (sub $300) to improve my setup. I've had my sights set on the...