Hello there, yes there is someone reading you, someone that thank you for this info sharing. Unlucky me thought, i've abandoned the project since i couldn't get to improve the sound from mine. I think the diaphragms are somehow broken or glued. Why you opt to have cups opened?

Well to "cut the rope" a whole components replacement is needed. What kind of modern diodes fit well in that older scheme?

Well the rolloff both low and high is quite BIG. No basses, dampened highs. If i try to crank up the volume from the amplifier, then the whole thing distorts badly.. EG: the bass from drumkick "farts out..."

Oh, i forgot to say that i've recapped the 0.0068 ones only. It remain to fix 3 caps. i'll posts updates asap

Hello everyone! I've got an old pair of KOSS "ESP 6 A", and long time ago i made a promise to myself, i gotta repair these! The sound quality was poor, the bias going on and off so fast.. I decided to open up the cups and of course i found the foam sea that melt upon everything. It took me a...