"Artemus" wrote in message
...

"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.)

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.

"David Looser"


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.


** Must be lotsa folks who have never had the dubious pleasure of listening
to out-of-phase signals on stereo phones - cos moulded on plugs and three
wire leads makes doing it even deliberately a bit tricky.

But those who have owned or mucked about with * electrostatic * or *
electret * head phones might well be aware of how it sounds - as there are
four wires to deal with and every chance that at some stage miss-connection
to the amp's speaker terminals will create the issue.

Damn shame these products have all but disappeared or become extraordinarily
expensive.

As a reference for sound quality ( or to hear exactly what is on a
recording) a pair of Stax Electrostatics were in a class of their own.


..... Phil

On May 14, 7:29*am, 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.)

Sounds like you got your fix.
(See Usenet really is good for something...)

Still, shoulda bought a pair of AKG K240's.
.....unless you got a huge stash of 8-tracks laying about. !!

-mpm

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.)

My first guess would be blue+ red- and black+ yellow-, but here's how to
find out. First hook them up, arbitrarily starting with what I said, or
the other way - it's a coin toss. Listen to something in mono. You'll
have to find your own mono source. (finding a mono source is left as an
exercise for the student.)

If the resulting sound comes from the middle of your head, you got
it right. If it sounds like two sources on either side of your head,
you've got the polarity wrong on one side or the other.

I'm getting this from remembering (I think) that in the old 4-wire
phone lines, green was tip and red was ring, and black was tip and yellow
was ring.
--- http://en.wikipedia.org/wiki/Tip_and_ring

Hope This Helps!
Rich

Well these leads plug into the ear sockets with little plugs, assuming they
are wired the sam, it should be a simple continuity job.

Most of those phones came with silly din plugs on the end as I recall.

It really does not matter how you do it of course as long as the
transducers are in phase at the end with two leads to earth of the plug.

While on the subject of these open back phones. I have a set of 414s and
need new ear cushions for them. anyone know if they can still be bought?

Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email:
__________________________________________________ __________________________________________________ __________


"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.)

"Brian Gaff" wrote in message
...
Well these leads plug into the ear sockets with little plugs, assuming
they are wired the sam, it should be a simple continuity job.

Most of those phones came with silly din plugs on the end as I recall.

The 414s originally came with DIN speaker plugs, but they changed to jacks
quite some time ago.

It really does not matter how you do it of course as long as the
transducers are in phase at the end with two leads to earth of the plug.

Well yes, that's what this thread has been about!

While on the subject of these open back phones. I have a set of 414s and
need new ear cushions for them. anyone know if they can still be bought?

I recently bought new muffs for a pair of 414s from Canford.

David.

In article ,
David Looser wrote:
The 414s originally came with DIN speaker plugs, but they changed to
jacks quite some time ago.

DIN plugs with a socket on the back so they could be inserted 'in line'
with other pairs. And a 1/4" stereo jack plug Y adaptor.

--
*The most common name in the world is Mohammed *

Dave Plowman London SW
To e-mail, change noise into sound.

On May 15, 12:45*am, "David Looser"
wrote:
"Brian Gaff" wrote in message

...

While on the subject of these open back phones. I have a set of 414s and
need new ear cushions for them. anyone know if they can still be bought?

I recently bought new muffs for a pair of 414s from Canford.


I wonder if they will last any longer than the originals. At 6.66 UKP
periodic replacement could get expensive, and stockpiling them would
be useless.

A Google search for 414 headphones pops bhphotovideo up to the top,
where the earpads are $5.50, about half the UK price.

"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.)

Hello Patrick.

http://www.sennheiser.com/sennheiser/old_manual.nsf/resources/HD_424_oNr_1082_Sp3.pdf/$File/HD_424_oNr_1082_Sp3.pdf

Left ear: Yellow is + and Black is -
Right ear: Red is + and Blue is -

Kindest regards.



--- Posted via news://freenews.netfront.net/ - Complaints to ---

"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?