Help with wiring colors on old headphones
"Artemus" wrote in message
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"Patrick" wrote in message
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I have some vinatge headphones (Sennheiser HD424) and want to attach a
new
plug.
Which color wires are the positive ones?
The colors in one of the leads are red & blue and in the other lead black
&
yellow. (No wire is used as screening - there's just two wires in each
lead.)
Wire them up to a mono source and insert a dpdt switch so you can
easily and quickly reverse the phase of one earpiece. Insert a PVC
T coupling between the earpieces. Compare the sound levels coming
from the bottom of the T while flipping the switch. Loudest is in phase.
Art
No. Don't mess around with "PVC T-coupling" or any other such nonesense,
just put the headphones on and listen. The effect of having them
out-of-phase is immediate and obvious. And as Phil said that is s far more
reliable method of ensuring correct phasing than assuming that the lead
colour use is consistent.
David.
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