[Howard59]

[size=medium]Hello everybody,[/size]
[size=medium]New to this forum, I own since a very very long time a STAX SR-34 (SRD-4 adapter + SR-30 electret headphone).[/size]
 
[size=medium]The cable needs (for the second time) to be replaced, but seems to be no longer available in Europe (more precisely in France).[/size]
 
[size=medium]This flat cable has a 5 pin connector and 4 wires (2x2). I think (and hope) I can replace it with a cable for model SR-202, but this cable has got 6 wires.[/size]
 
[size=medium]So my question is : what should I do with the 2 wires I don’t need ? Cut their ends on the headphone side, but how to decide those to use and those I don’t need ? Other choice : join together 2 of them on each side (left /right), but again, which ones ?[/size]
 
[size=medium]Unfortunately, I tried several times to insert images to show you both the inside of my headphone and the 202 cable, but the answer was "There was a problem submitting this to the server. Please try again."[/size]
 
[size=medium]Thanks for any help.[/size]

 

[spritzer]

A 6 pin cable will work just fine but you need to insulate the middle wire inside each of the cups very well.  This wire will carry the +580V bias voltage if the set is ever plugged into a normal Stax output so you do not want them touching the metal chassis.  The other two wires are the + and - audio signals needed to drive the diaphragm.  The wire with either the solid or dashed line is the + (goes to the stator closest to the ear) and the unmarked one is - (goes away from the ear).  The dashed line is right while the solid line is left. 

 

[Howard59]

Thanks very much for this (sorry for the delay), Spritzer, I will do what you suggest.

 

[Howard59]

I'm very glad to say that the answer I received to my question allowed me last night to replace the old cable with a new one. The cable I bought on the Internet last week (in Great Britain) and received on monday was referenced "SR-207". I can't say it was very easy for me to do it. It was not, but I finally succeeded ! Sorry for this, but I'll post several replies, as even if I hit "Return" on my keyboard, all the text stays in one block when I click on "preview"...

 

[Howard59]

The cable I bought on the Internet last week (in Great Britain) and received on monday was referenced "SR-207". I can't say it was very easy for me to do it. It was not, but I finally succeeded ! During the operation, I carefully looked with a magnifying glass at the diaphragms, they are all in a very good shape, absolutely no little hole nowhere like I saw in this forum on some pictures.

 

[Howard59]

Then I plugged the new cable in the adaptor, itself reconnected to the loudspeakers outputs of my McIntosh integrated amp (MA6800). I was not yet sure I could hear some nice music from these old ear speakers, but yes, it worked, and very fine, much more than I expected !

 

[Howard59]

Now another question : as my amp is fitted with "autoformers" and three different impedance outputs (2, 4 and 8 ohms), is the connection of the Stax adaptor to the 4 ohms output OK, or would it be better (safer ?) to use the 8 one ? The 4 one is easier for me, as the Dynaudio loudspeakers I use are around this impedance.

 

[spritzer]

The 207 is just the latest in a long line of headphones that have used this same cable so that's what they call it. 
 
The transformers will be fine off the 4ohm taps.