[n4vz]

My 8 year old Sennheiser 558s began rattling and I found online that it's usually a result of a hair on the driver. Sure enough I take it apart and there's a hair, so I clean it all out and put it back together. After that, music sounded weird, was slightly louder and clearer in the right ear, the one that had the issue. Thought this was due to the cleaning I did so I cleaned out the left side as well, and now it sounds like complete garbage.

There is 0 bass in the left ear and it is significantly quieter. Took it apart several times after that to no success, but noticed that one of the clips that hold the driver in place broke, could that be it?

 

[Sintek]

Have you checked the wiring to make sure nothing came loose or got pinched? Any chance the wire that runs through the headband got stretched and severed inside?

 

[n4vz]

I don't think so, the issue is definitely from the driver itself as it came up after fiddling with it. Do you think it could be the broken clip? I could try supergluing it in place or something.

 

[n4vz]

Alright, I took the driver out and it still sounded the same but noticed that the paper(?) covering on the driver was pushed in, after fixing that it sounded normal. So I inserted the driver back in very lightly, and it sounds good now.

 

[n4vz]

Unfortunately have run into a new problem, everything sounds like it's coming from behind me. What could be causing this? The drivers not being pushed in far enough?