Sennheiser HD25-1 Diagnose and Repair

This instructable will show you how I fixed the cable connection to Sennheiser HD25-1 headphones.

I bought these off a friend, they're 8 yrs old but instantly became my favorite cans.  They developed an issue where sound would cut or reduce volume in the left driver, this was temporarily fixed by jiggling the connector where it meets the driver until sound restored.  I decided to fix the connector once and for all.

I searched the net and found many others with the same problem, a common flaw in an otherwise flawless and indestructible pair of headphones.  
The common suggestion was to replace the cable (Min $50 for a Sennheiser 1.5m steel cable) or replace the driver (even more expensive and unnecessary for this issue).

My fix costs $0, works perfectly, and all you need is a soldering iron and some solder.

Step 1 What you need.

To open the capsule and get to the internal connectors (diagnose only) :
-Small flat head screwdriver

For the cable connector fix:
-Needlenose pliers
-Soldering Iron
-Solder

Comments

[johnik354]

Thatks for such a useful post! I don't need to repair my Sennheiser headphones now as they are working just perfectly, but if they fail I'll know what to do)

[lcarroll1]

Just finished soldering my headphones and they now work perfectly.


Thanks a lot for the top advice

[thällestrand]

Worked perfectly for me! im even purchasing another pair of sennheisers in order to fix and resell em!