Gentlemen, a fan as I am of vintage AKGs, it seems this thread has gone astray. I'm sure there are other excellent AKG threads where these matters can be discussed and also be more easy to search for those interested.
I haven't listened to orthos for a couple of months, been busy with my amp system and trimming my Staxes and... AKGs. Today I decided to try orthos with the system and gathered my HP50s. Turned out there were more than I remembered, even though I have picked up one now and then during the years, when they still are available. Good to have spare parts (drivers tend to fail) and be ready to mod the ultimate HP50.
To cut a long story short: once again the time coherence, dynamics and smooth response surprised me. Even though the sound stage cannot compete with the AKGs in size, the precision of placement in the stereo mix is astounding. This is what I call time coherence, and when this clicks the sense of air and space is just wonderful, it's so easy to identify and follow lines and instruments in the music's flow.
Some of the HP50s are untouched (good to have as reference), some have been modded to various degrees. What surprised me was that the first one I bought and damped actually sounded best, a battered and worn HP50S with cat scratches and all. Must have look and see what I did to that one... but basically these headphones just need a disc of felt or two.
Edited by MDR30 - 8/2/13 at 6:44am