The Beyer sounds great, but I find the HE-5LE to be a bit too dark for my tastes. Now, reading around head-fi, I see that some prefer power amps for these and their successor, the HE-6 (for which Fang recommends a 5 to 30 WPC amp). Asking on the Bottlehead fprum (since I also have one of their amps), I found out that their S.E.X. kit has a 120 ohm resistor on the output, whose only reason to be their is to reduce the gain for low impedance 'phones, and they recommendd that I could remove it for these orthodynamics.
Since I don't own a S.E.X., I was hoping to try it, if it had been possible, on the Castanet to see if it had any effect on the sound quality.
By the way what are the differences between the low and high impedance headphone outs? They do seem to sound different, with the high impedance headphone out giving me more impacts, but sounding more compressed (less extension, less soundstage).
