Wow. I'm doing an a/b comparison of the hd580 with the tenores. The tenore is a clear winner. The hd580 sounds congested and "honky" in comparison. Overall, they actually both have a very similar frequency flatness, but the tenores I have sound smoother, more open and more micro detailed. The hd580 sound a bit thicker in a way, but not really in a better way. I'd almost say it was distortion levels are high, but I have no idea what the 580 distortion levels are. It just sounds like the sound is less pure in some way, even though they both sound extremely flat in response. I'm shocked though.
I was expecting a difference, but not the tenores being noticeably better. I've compared jazz and rock so far and both are obvious. And for anyone curious, I'm using my lossless collection, via my apogee interface and my custom passive a/b switch I made to expedite switching phones. I'd say there a 4-5 second delay between the 580 and the tenore and a 2-3 second delay between the tenore and the 580.
Just quickly using the GE graph to flatten the hd580 even more, it starts to sound more like my tenores. I think my tenores are almost a perfect line on the GE graphs.
Nothing too specific, but flattening out the slight treble bumps and whatnot based on the GE graph makes the 580 sound a lot closer to my tenores. They're not identical still, but frequency-wise, extremely similar. Enough that I'd say the tenore is a nice in-ear for someone coming from the sennheiser HD series. I think the 3khz area is what I associate with "honky" sound. I seem to be very sensitive to this area as well, as I eq it down on almost everything i use. I find the tenore even has a bump there like the er4s, but it sounds less boosted to me, so I don't use eq. Maybe 1-1.5db opposed to the er4s 3db or so.
Anyway, very cool. :-)
Edited by luisdent - 5/31/14 at 3:21pm