Hi everyone,
sorry for digging this post up. Last year i bought a second hand P5 (still sounded good and looked new). Lately its left ear (where the cable comes in) have ceased to sound. I have tried may ways and got the results below; I'll name everything i noticed, since I'm not a professional, somethings might be not relevant:
- I tried to
switch cable, it still didn't work. I even checked if the cables were broken with my multimeter, the cables were in good condition.
- I plugged it to the
phone port on my mixer (with which I can send in very strong signal and pan completely on the left side). I did so, of course I was very cautious, i put the volume knob (initially at minimum) to maximum and muted it immediately after. After a few tries, the left earpiece began to sound normally. However, as i wore the headphones on my head, the left piece was mysteriously muted again. I tried this way several times, this kept happening.
- I
first removed the ear pad of the left piece, then conducted the same experiment as above. It functioned very stably. It only became muted after i put on its ear pad. More precisely, it still sounded after i put on the ear pad, but once i wore it, it was muted again. I did several more times and found out, it would only be muted (after being enabled by sending in very strong signal through my mixer, like described in the section above)
if the ear pad is on and is pressed. I thought that this must be due to the interaction between the MAGNETS inside the piece as well as on the ear pad (those are used to attach the earpad to the speaker, not that what belongs to driver), but as i put strong neodym magnets on the ear, they didn't affect.
- According to the result mentioned above, I thought it should work fine if i separate the ear pad a bit from the ear piece. I used a very thin magnetically-conductive (prob. conventional iron) metal leaf, folded it 2 times with total thickness about 0.8mm and inserted it between the pad and piece at the position of their magnets. The piece now work perfectly stably.
This were my attempts. Though I'm fine with this for now and the sound quality is not affected, that small distance makes the left piece sounds noticeably quieter than the right one (can fix through cutting the foam a bit off so the ear pad become thinner) and more important, I can't know if and when this problem will occur again. Like i mentioned it's second hand, i can receive no guaranty. Can you guys guess what can be the cause? thank you so much
