I'm planning on buying an Equation Audio RP-21 headphone set.   I'll be listening to music with it on my computer and zune, but I also need to use with my line 6 podxt.  If you don't know what a podxt is, it's guitar amplifier modeler.  You connect you guitar to the pod and connect the pod to a...

Hello.  While doing some research, I found some older frequency response graphs from headroom.   This one is from 2004 http://www.sgheadphones.net/index.php?s=&showtopic=2786&view=findpost&p=45614   This one is from 2008 http://www.max.grenkowitz.net/show.asp?topic=726   But if...