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Replacement of a STAX SR-30 cable

post #1 of 8
Thread Starter 

Hello everybody,

New to this forum, I own since a very very long time a STAX SR-34 (SRD-4 adapter + SR-30 electret headphone).

 

The cable needs (for the second time) to be replaced, but seems to be no longer available in Europe (more precisely in France).

 

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.

 

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 ?

 

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."

 

Thanks for any help.

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post #2 of 8

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. 

post #3 of 8
Thread Starter 

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

post #4 of 8
Thread Starter 
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"...
post #5 of 8
Thread Starter 
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.
post #6 of 8
Thread Starter 
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 !
post #7 of 8
Thread Starter 
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.
post #8 of 8

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. 

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