Bump for curiosity on how this turned out.
I just got a pair of 770s again. I never modded my first set and I want to completely rebuild this go around.
I did a felt damping mod on a 250Ohm DT770 today (leave room for the inner ring) and it did wonders! Oh the treble smoothed out and the mids did fill it. Bass also got stronger. It's a pretty nice improvement is SQ.
anyone tried angling the drivers? (think T5p :P )
i took two short strip of blu tac about 3to5mm thick, two cm long,
stuck them to the left n right side of the cup near the top circumference..
and stuck the driver on top of the bluetac on one edge,
and beneath the bluetac on the other edge..
the driver is thus sitting at a slight angle...
the plastic ring holding the driver was removed and not used.
i put back the black circular foam, and put back the pads.
( i might replace the bluetac with doublesided felt )
music sounded more "frontal" .