Replacement connector for Sennheiser PX 250 doesn't work...

0.6 m cable: http://www.custom-cable.co.uk/sennheiser-replacement-lead-3m-en-2.html
1.2 m cable: http://www.custom-cable.co.uk/sennheiser-replacement-lead-for-ie8-1.2-metre-length.html
1.2 m cable with remote and mic (for iPhone) http://www.custom-cable.co.uk/sennheiser-replacement-lead-for-ie8i-1.2-metre-inc-mic.html

Sounds like u have a bad wire, Its fixable depending on where the break is. If its near the plug end, u can head to ur nearest radio shack and get a replacement, however, if the break is in the leading headphone, though still fixable but requires a bit more tech savy. As long as u can operate a pair of wire cutters and a soldering iron, youll be good to go

If you click my user name you will find a tip about headphones and how to repair the jack.

See my tip on headphones. Just click my user name to find it.

You might want to take a look at my Tip on headphones, right at the bottom of it. Just click my user name to find it.

See my tip on headphones jack/cable problems. Also sometimes they put on a special coating on the wires. You have to scrape the wire or file it to remove it. Spit is also good at making the solder stick!

The impedance or resistance of the two different sets of wires might be different. The higher the impedance the less signal. If your cable is long enough you are better off spending the five or so dollars for a new plug. Red is right, green or blue is left and copper is ground.( Usually) Unfortunately not all manufacturers agree. Also what could have happened is a short between the wires that you soldered.Make sure they are physically separated from each other and insulated.

it looks like you can buy some replacement ear pads from the following link.

http://www.thomann.de/gb/sennheiser_pmx_60_ohrpolster.htm

hope this helps. :)

My jack plug lead got yanked and broke the wires inside the electronics unit. There are three screws to undo in order to get inside the electronics, one by the cable entry and two very small cross head scvrews in deep holes halfway along the unit. I cut the jack lead on the outside close to the cable entry and drilled out the hole through the cable guide and then poked the jack cable back through the hole into the electronic unit. I was able to solder the three leads to their respective pads. There are five solder pads next to the cable entry. With the cable entry at the top, the middle pad connects to the green cable, the rightmost pad connects to the red cable and the copper connects to a pad about 1 cm down from the rightmost connector. The technique was to tin the ends of the leads with solder before soldering them to the pads. I used a blob of glue from a glue gun to hold the cable in place inside the electronics unit. My plan B if the soldering was not possible was to take a jack plug and lead from an unused set of earpieces and use that lead in place of the original. It would have been much more difficult to replace the lead from the electronics unit to the headset.