Cool mods, first off.
You could try decreasing the ear chamber volume. Whether that's using some type of foam around the inner perimeter of the pads, changing to supra-aural pads, or adding supra-aural pads underneath the cirumaurals you're using now I don't know. Also, you could try damping the fronts of the drivers, or give a bass lens another shot. This will most likely make them a bit less sensitive and harder to drive, but my SFI-380's had front-damped drivers, extensively reduced ear chamber volume, were a sob to drive, yet had really nice bass, imo. Driver housings were also open, but this should reduce bass compared to your project there, I 'd imagine. Sorry if it's been stated, I forget the exact details of your mods, but what's going on with your drivers housings in regards to venting? Bass port? Anyway, good luck.
I just tried using bass lens again before i finish modding using a thick felt (the same thing i used before) but i covered the felt with leatherette and the bass really didn't improve for me. I will also try using supraaural pads since I have alot of them here, hehe...
im supposed to reduce the ear chamber yesterday using thick cotton so that it would look fluffy on the outside but i totally forgot! thanks for reminding me!
any idea what material to dampen the front of the driver? there is nothing covering infront of the driver.
no bass port on the cup area, but on the baffle/driver area i think there is a huge air flowing out due to baffle design. ill try to take pics when i have time.
the current mod only consists of
- accoustifoam behind the drivers
- creatology adhesive felt inside the cups, didn't remove the sticky material though since it is only temporarly
- sometimes i stuff the back of the pads using a rope (from the srh 940 rope mod) to give abit more bass response but the headphone pads' "flap" is starting loosen up