Funny guy " class="bbcode_smiley" height="" src="http://files.head-fi.org/images/smilies//smily_headphones1.gif" title="" width="" /> , So this is like the overall impedance of the entire circuit? I'm more trying to clear up noob ideas of EE theory.
What do you think of that amp for the LCD-2? Specwise at least if you haven't heard it. I just have a want to try a Mapletree amp, for no particular reason.
Its the impedance as seen by the output. Think of it as a series resistor with the headphone. Dampening factor is simple the can impendance over the output impendance. So 50/1.3 ~38 which is fine. Power wise its probably fine depending on how loud you listen. Won't push 120dB but 80dB shouldn't be a problem. At that price the WA6SE might be a safer choice.