Hey guys, I've had the HD558s (foam mod) for about a week now, and have been really enjoying them... While reading other's thoughts I found this article http://marlene-d.blogspot.com...
If you scroll down to the "Tech Section" he claims that plugging the headphones into anything greater than 60 OHMS will cause the sound to become extremely bassy (referring to the large spike in the impedance response chart), and flood the mids and highs. So to test this I unplugged them out of my Magni and into the stock output on my computer. Wow, the mids and highs became far more clear, and the separation in instruments felt almost double it's previous capacity. Now I'm sort of a noob to this HiFi world, could someone please either confirm that this is the case, or if it's just placebo effect? Only reason I doubt it's a placebo effect is that I WANTED to like the sound coming from the magni better, considering it costs $100 and the chip on my MOBO is probably worth $2.
If you look to this graph here > http://graphs.headphone.com... you can see that the HD598 & HD600 have similar impedance response forms. So if you have either of those, any information would still be relative I think.
Any input or experience here would be much appreciated, thanks!