On May 16, 2:38*pm, "FedUpLurker" wrote:
"Patrick" wrote in message

...

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.)

You've certainly set the cat amongst the pidgeons.
It's getting right leary in here. So a search topic for you:
How do barn owls locate prey just by listening?

Once you've done a search on that relevant subject:
Spatial hearing (a collection of files to enjoy)https://mustelid.physiol.ox.ac.uk/dr...patial_hearing

Acoustic Holography (A bit of engineering)http://www.lmsintl.com/acoustic-holography

Now some more subjects for you to type into the
search engine of your choice:

Psychoacoustics
Cochlear nuclei
Neural action potentials.
Auditory masking
Missing fundamental
Hypersonic effect
Diana Deutsch
Dr. Daniel J. Levitin
Sound localization by the human auditory system
Lateral information
Interaural time differences
Phase delays
Group delays
Parallel processing pathways in the brain
Axons of the auditory nerve

I'll check back in a week or so.
PS. Ever heard of Q-Sound?

Learn a bit about Kemar Manikin he
http://www.eartunes.com/if/audiology-inf-107.shtml

Patrick wrote:

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.)

If they are the standard voice coil types, put them in front of a stereo
speaker and drive the amp with a sine wave. The headphone 'speakers' will
act as microphones. Use an oscilloscope on the pairs of leads to determine
phasing.

--
Paul Hovnanian
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Will code for food.