Do you have a microphone enabled? If so, you may have to move its location away from the headphones.
SOURCE: Bad battery for my Sennheiser HDR 45 headphone
A replacement battery can be purchased from Sennheiser for $20.00.
Battery is: BA 151
Sennheiser Link:
http://www.sennheiserusa.com/newsite/productdetail.asp?transid=004146
SOURCE: Loud hum in Sennheiser HDR 6-9 headphones.
It's been a while since you posted this, Were you able to get the problem solved? If you are in the NY metro area, I have an extra T6-9 and I could test to verify if the proble is with the headset or the Freesound unit.
SOURCE: I have Sennheiser HD 570
That part isn't available from Sennheiser. But they are pretty maintainable, if you're good with mechanical things, and if you can come up with another set of the same headphones for parts.
If you've already replaced your headphones and want to rid yourself of the broken 570's, I'm looking for a set to scrounge for parts.
SOURCE: i've noticed that replacement inner
The ear padding is attached to and held in place by a plastic ring that fits into the speaker mount. Gently pull the ear padding outward so you can see the ring, then slip a flathead screwdriver or other object in (just a bit, you don't want to poke the speaker inside). Gently pry up , sliding your pry-bar along, and the pad should pop out quite easily.
SOURCE: Sennheiser Hd 205 headphones stopped working properly
the problem is the cable from one driver to the other suffers from fatigue due to the bending of the plastic frame as the headphone fits to your head, causing copper cables to disintegrate.
the solution is to take apart the headphones (mini and regular Phillips screwdriver ONLY required) and solder a new cable in. in my case i used a standard coaxial cable for replacement.
once you have split the end of the senheiser cable output from cup 1 into its two parts you need to attach it to the equivalent connections on cup 2 (which u also need to split, i suggest using a modeling knife)
the red wire is insulated with ceramic coating much the same way as an electromagnet winding, the other is standard copper. you must attach copper to copper red to red with YOUR OWN cable.
the most difficult part is removing the ceramic insulation coating on the red wire, which i removed with a blast from a cigarette lighter. simple.
problem is your cable probably will not fit in the slot designed for the previous cable so i drilled a small hole in the BACK of the cup (silver colored horse shoe shape) and ran the cable outside the plastic case. not pretty but it saved me £40 for 2 hours work, which is not bad.
i am a trained mechanical and electrical engineer so u can trust.
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