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.)

"Patrick"

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.)


** Stick the damn phones on your fat head and connect pairs of wires to a AA
battery until you hear a click.

Now you have your two pairs of wires.

Wire them to a plug any way around you like and connect the same AA to the
common and both positives at the same time.

If the click seems to comes from right inside your head - game over.

If you need more explanation - you do not deserve it.



...... Phil

On 12:44 14 May 2011, Phil Allison wrote:


"Patrick"

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.)


** Stick the damn phones on your fat head and connect pairs of wires
to a AA battery until you hear a click.

Now you have your two pairs of wires.

Wire them to a plug any way around you like and connect the same AA to
the common and both positives at the same time.

If the click seems to comes from right inside your head - game over.

If you need more explanation - you do not deserve it.

..... Phil

The four wires are already grouped as two pairs, so we already know which
two wires go together.

I want to get the phasing right (even for headphones). I need to know
which color wire in each pair is the positive.

Are you familiar with decoding these red & blue and black & yellow
headphone wires?

On 14/05/2011 12:54, Patrick wrote:
On 12:44 14 May 2011, Phil Allison wrote:


"Patrick"

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.)


** Stick the damn phones on your fat head and connect pairs of wires
to a AA battery until you hear a click.

Now you have your two pairs of wires.

Wire them to a plug any way around you like and connect the same AA to
the common and both positives at the same time.

If the click seems to comes from right inside your head - game over.

If you need more explanation - you do not deserve it.

..... Phil

The four wires are already grouped as two pairs, so we already know which
two wires go together.

I want to get the phasing right (even for headphones). I need to know
which color wire in each pair is the positive.

No you don't need to know it. It will be abundantly clear if you have
the phase in one ear wrong by 180 degrees - unless that is you are deaf.

Are you familiar with decoding these red& blue and black& yellow
headphone wires?

I would hazard a guess red, yellow are positive and blue, black
negative. But why didn't you make a note of where the cables were
connected when you took the original apart?

There are only four wires as two trivially distinct pairs - the worst
that can happen is you need to flip a pair if you choose incorrectly.

Regards,
Martin Brown

On 13:22 14 May 2011, Martin Brown wrote:

On 14/05/2011 12:54, Patrick wrote:
On 12:44 14 May 2011, Phil Allison wrote:


"Patrick"

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.)


** Stick the damn phones on your fat head and connect pairs of wires
to a AA battery until you hear a click.

Now you have your two pairs of wires.

Wire them to a plug any way around you like and connect the same AA
to the common and both positives at the same time.

If the click seems to comes from right inside your head - game
over.

If you need more explanation - you do not deserve it.

..... Phil

The four wires are already grouped as two pairs, so we already know
which two wires go together.

I want to get the phasing right (even for headphones). I need to
know which color wire in each pair is the positive.

No you don't need to know it. It will be abundantly clear if you have
the phase in one ear wrong by 180 degrees - unless that is you are
deaf.

Are you familiar with decoding these red& blue and black& yellow
headphone wires?

I would hazard a guess red, yellow are positive and blue, black
negative. But why didn't you make a note of where the cables were
connected when you took the original apart?

There are only four wires as two trivially distinct pairs - the worst
that can happen is you need to flip a pair if you choose incorrectly.

Regards,
Martin Brown

Years ago someone wired up these headphones to a 1/4 inch plug and they
they say they don't know what polarity meant. There's no point following
their clueless wiring.

Out of phase headphone transducers create a far more subtle adverse
effect than that noticed in loudspeakers, so it is not something
immediately evident by A-B testing. Nor is testing necessary if someone
here knows what the color coding is.

"Patrick = another PITA Jerk

Out of phase headphone transducers create a far more subtle adverse
effect than that noticed in loudspeakers, so it is not something
immediately evident by A-B testing.


** That is 100% ****ing BULL**** !!!!!!!!!

With any mono signal, the difference is HUGE.

Do exactly what I said you PITA moron.

If the click seems to comes from right inside your head - game over.

If you need more explanation - you do not deserve it.



..... Phil

On 14/05/2011 13:46, Patrick wrote:
On 13:22 14 May 2011, Martin Brown wrote:

On 14/05/2011 12:54, Patrick wrote:
On 12:44 14 May 2011, Phil Allison wrote:


"Patrick"

I have some vinatge headphones (Sennheiser HD424) and want to
attach a new plug.

Which color wires are the positive ones?

Are you familiar with decoding these red& blue and black& yellow
headphone wires?

I would hazard a guess red, yellow are positive and blue, black
negative. But why didn't you make a note of where the cables were
connected when you took the original apart?

There are only four wires as two trivially distinct pairs - the worst
that can happen is you need to flip a pair if you choose incorrectly.

Years ago someone wired up these headphones to a 1/4 inch plug and they
they say they don't know what polarity meant. There's no point following
their clueless wiring.

Out of phase headphone transducers create a far more subtle adverse
effect than that noticed in loudspeakers, so it is not something
immediately evident by A-B testing. Nor is testing necessary if someone
here knows what the color coding is.

A pair of headphones with incorrect phasing is about as obvious as being
hit on the head with a brick. Amplifier to mono and try listening to
something. If you have it right the sound source will appear to be very
close to the middle of your head and if not it will be in different
places or spread out depending on the frequency.

If you can't tell the difference you don't deserve a hifi system.

You could always look at the cables at the transducer end.

Regards,
Martin Brown

"Patrick"
Phil Allison wrote:
"Patrick"

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.)


** Stick the damn phones on your fat head and connect pairs of wires
to a AA battery until you hear a click.

Now you have your two pairs of wires.

Wire them to a plug any way around you like and connect the same AA to
the common and both positives at the same time.

If the click seems to comes from right inside your head - game over.

If you need more explanation - you do not deserve it.



The four wires are already grouped as two pairs, so we already know which
two wires go together.

I want to get the phasing right (even for headphones). I need to know
which color wire in each pair is the positive.


** I just gave the the answer - you ****ing idiot.



..... Phil

On 05/14/2011 04:54 AM, Patrick wrote:
On 12:44 14 May 2011, Phil Allison wrote:


"Patrick"

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.)


** Stick the damn phones on your fat head and connect pairs of wires
to a AA battery until you hear a click.

Now you have your two pairs of wires.

Wire them to a plug any way around you like and connect the same AA to
the common and both positives at the same time.

If the click seems to comes from right inside your head - game over.

If you need more explanation - you do not deserve it.

..... Phil

The four wires are already grouped as two pairs, so we already know which
two wires go together.

I want to get the phasing right (even for headphones). I need to know
which color wire in each pair is the positive.

Are you familiar with decoding these red& blue and black& yellow
headphone wires?

"If the click seems to come from right inside your head - game over".

What more do you need? Phil's given you a test to see if the phasing is
correct, can you not figure it out, or what to do if the click seems to
come from your right or your left?

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html

"Tim Wescott"

"If the click seems to come from right inside your head - game over".

What more do you need? Phil's given you a test to see if the phasing is
correct, can you not figure it out, or what to do if the click seems to
come from your right or your left?


** If both ear phones work but are wired out of phase, the AA cell click
test produces a sound that seems to be originating outside the head on both
sides. Mono speech or music sounds much the same.

The effect is far MORE pronounced than with typical stereo speakers in a
room.

The OP demonstrates his a monumental ignorance of headphones, hi-fi sound,
usenet etiquette and common sense.


..... Phil

On 05/14/2011 05:31 PM, Phil Allison wrote:
"Tim Wescott"

"If the click seems to come from right inside your head - game over".

What more do you need? Phil's given you a test to see if the phasing is
correct, can you not figure it out, or what to do if the click seems to
come from your right or your left?


** If both ear phones work but are wired out of phase, the AA cell click
test produces a sound that seems to be originating outside the head on both
sides. Mono speech or music sounds much the same.

The effect is far MORE pronounced than with typical stereo speakers in a
room.

The OP demonstrates his a monumental ignorance of headphones, hi-fi sound,
usenet etiquette and common sense.

Only tangentially related, and mostly useless:

Amateur radio folks like building direct conversion receivers (i.e., mix
down to baseband). They're simple, hence little, and they work pretty
well. Their biggest problem is that they have no audio image rejection
at all -- listening with a 7040kHz oscillator, you'll hear a signal at
7040.5 just the same as one at 7039.5.

You can get around this by making a so-called "phasing" receiver
(basically an image-reject downconverter, but ham radio has its own
terminology), but then you're back to something complex.

If you build an I/Q downconverter, and amplify each channel to a
headphone channel, then apparently you get a spatial perception of the
tones -- upper side tones sound like they're coming from a different
point in space than lower side tones, and (presumably due to the phase
shift in the amplifiers, I don't know) high and low tones do as well.
It's claimed that this makes it easier to use for morse code reception.

I've always thought that was interesting, but haven't tried it.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html

On Sun, 15 May 2011 10:31:35 +1000, "Phil Allison"
wrote:

** If both ear phones work but are wired out of phase, the AA cell click
test produces a sound that seems to be originating outside the head on both
sides. Mono speech or music sounds much the same.

The effect is far MORE pronounced than with typical stereo speakers in a
room.

Puking two speakers with front panels against each other is a quite
easy way to check polarity. If the polarity is correct, you will hear
some low frequency sounds emitted from the combination. If the
polarity is wrong, you will hear only mid- and high pitch sounds,
since the low frequency air is moving between the cones of the
speakers.

With headphones, you either get "in head" or unrealistic sound
depending on the phasing of headphones.

Sennheiser did the wiring correctly by keeping all four wires separate
and connected to a 4 pin DIN plug and by adding a 4 pin DIN to 6.35 mm
plug adaptor.

As a kid, I was really ****ed of by the convention of using common
returns in headphones. I was testing frequency diversity reception of
the same broadcast programs on two different shortwave bands with two
receivers. Unfortunately, the other receiver was of AC/DC type with
the full 220 Vac in the chassis. Thus I had to rewire the phones so
that one side could (potentially) siting on 220 Vac, and the other
side sitting close to ground potential.

After this alteration, I had no problems with this arrangement.

No problems, no problems, no problems :-)

In article ,
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.)

Black and blue are the commons. Not that it would make any difference if
you commoned red and yellow.

You can check for sure by unplugging the leads from each actual earpiece
(red and blue plugs), but be careful to pull on the actual plug only. The
pins are of slightly different sizes.

Hope you have a source of the muffs for these - they crumble to dust quite
quickly.

--
*Am I ambivalent? Well, yes and no.

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

On 13:07 14 May 2011, Dave Plowman (News) wrote:

In article ,
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.)

Black and blue are the commons. Not that it would make any difference
if you commoned red and yellow.

You can check for sure by unplugging the leads from each actual
earpiece (red and blue plugs), but be careful to pull on the actual
plug only. The pins are of slightly different sizes.

Hope you have a source of the muffs for these - they crumble to dust
quite quickly.

You must know the headphones well because I had long forgotten the leads
plugged into the earpieces. I didn't realize the mini plugs were keyed to
go in only one way around. With that info I could have continuity tested
the colored leads to each of the larger pins on the plugs but you saved me
doing that becauase you have given me the color coding too. Thank you.

You're right about the muffs crumbling. I threw them out. First I'll see
what the cans sound like now and then decide if it's worth getting new
muffs.

It's been instructive to see how many people misunderstood what the
original question was trying to solve and they gave obviously useless, if
not misleading, advice. It's never been the same since Eternal September.

"Patrick is a Psycho ASSHOLE "

It's been instructive to see how many people misunderstood what the
original question was trying to solve and they gave obviously useless, if
not misleading, advice. It's never been the same since Eternal September.


** Listen here - pal.

You do not need any headphones worn over your ears - YOU need a ****ing
bullet between the ears.

Same goes for the retarded bitch that bore you and the donkey that knocked
her up.

Never come back or I will really tear you apart.



..... Phil

On Sat, 14 May 2011 23:22:51 +1000, Phil Allison wrote:

"Patrick is a Psycho ASSHOLE "

It's been instructive to see how many people misunderstood what the
original question was trying to solve and they gave obviously useless,
if not misleading, advice. It's never been the same since Eternal
September.


** Listen here - pal.

You do not need any headphones worn over your ears - YOU need a ****ing
bullet between the ears.

Same goes for the retarded bitch that bore you and the donkey that
knocked her up.

Never come back or I will really tear you apart.



.... Phil

This type of threat should be forwarded to http://www.individual.net/



with the entire header field including message ID.

There is no excuse for this type of venomous reply and most all
responsible news providers will terminate the responsible account
without question.



--
Live Fast Die Young, Leave A Pretty Corpse

"Meat Plow" wrote in message
news
On Sat, 14 May 2011 23:22:51 +1000, Phil Allison wrote:

"Patrick is a Psycho ASSHOLE "

It's been instructive to see how many people misunderstood what the
original question was trying to solve and they gave obviously useless,
if not misleading, advice. It's never been the same since Eternal
September.


** Listen here - pal.

You do not need any headphones worn over your ears - YOU need a ****ing
bullet between the ears.

Same goes for the retarded bitch that bore you and the donkey that
knocked her up.

Never come back or I will really tear you apart.



.... Phil

This type of threat should be forwarded to http://www.individual.net/



with the entire header field including message ID.




There is no excuse for this type of venomous reply.....

Au Contraire, Phil is the excuse for this type of venomous reply.
Mikek
PS.
Patrick,
We do get some rather interesting diatribe from Phil, rarely with any good
reason.
Don't take it personal, he's not nice to anybody.
Phil has some issues he deals with, but when he answers an electronics or
audio
question he's most likely right.

"Meat Plow"


** This trolling asshole is a narcissistic psychopath.

He knows nothing and understands even less.

I want the lunatic jerk kicked right off usenet.

Who will help me ?




..... Phil

"Patrick" wrote in message
...
On 13:07 14 May 2011, Dave Plowman (News) wrote:

In article ,
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.)

Black and blue are the commons. Not that it would make any difference
if you commoned red and yellow.

You can check for sure by unplugging the leads from each actual
earpiece (red and blue plugs), but be careful to pull on the actual
plug only. The pins are of slightly different sizes.

Hope you have a source of the muffs for these - they crumble to dust
quite quickly.

You must know the headphones well because I had long forgotten the leads
plugged into the earpieces. I didn't realize the mini plugs were keyed to
go in only one way around. With that info I could have continuity tested
the colored leads to each of the larger pins on the plugs but you saved me
doing that becauase you have given me the color coding too. Thank you.

You're right about the muffs crumbling. I threw them out. First I'll see
what the cans sound like now and then decide if it's worth getting new
muffs.

It's been instructive to see how many people misunderstood what the
original question was trying to solve and they gave obviously useless, if
not misleading, advice. It's never been the same since Eternal September.

Actually that's untrue, nobody misunderstood the question or gave useless or
misleading advice. And Phil is quite right, the effect of having the
headphones out of phase with each other is not at all subtle, it is at least
as obvious as it would be with speakers. Just because there is no phase
cancellation in the air doesn't mean that the brain is not immediately aware
of the phase difference heard in the two ears.

David.

"David Looser"
Some damn idiot wrote:

It's been instructive to see how many people misunderstood what the
original question was trying to solve and they gave obviously useless, if
not misleading, advice. It's never been the same since Eternal
September.

Actually that's untrue, nobody misunderstood the question or gave useless
or misleading advice. And Phil is quite right, the effect of having the
headphones out of phase with each other is not at all subtle, it is at
least as obvious as it would be with speakers. Just because there is no
phase cancellation in the air doesn't mean that the brain is not
immediately aware of the phase difference heard in the two ears.


** I have come across folk with their hi-fi speakers wired out of phase and
gone un-noticed for months or years. Room acoustics and listening position
being critical to observing the fact. However, stereo headphones wired out
of phase is just the weirdest sound and not tolerated by many for long.

Headphone listening is nothing like listening to stereo speakers or natural
sounds in the environment - the outer ears are no longer involved and moving
one's head has no effect on the sound heard. The stereo effect becomes
extreme and the "sound stage" appears to be inside one's head extending left
and right as well. Plus the who damn thing moves about with your head
movements.



..... Phil

On May 14, 5:47*pm, "Phil Allison" wrote:

** I have come across folk with their hi-fi speakers wired out of phase and
gone un-noticed for months or years. *Room acoustics and listening position
being critical to observing the fact. *However, *stereo headphones wired out
of phase is just the weirdest sound and not tolerated by many for long.

Headphone listening is nothing like listening to stereo speakers or natural
sounds in the environment - the outer ears are no longer involved and moving
one's head has no effect on the sound heard. The stereo effect becomes
extreme and the "sound stage" appears to be inside one's head extending left
and right as well. Plus the who damn thing moves about with your head
movements.

That's why we really should have binaural recordings for headphone
playback. Weren't there stereo-to-pseudo-binaural converters at one
point?

"David Looser" wrote in message
...
"Patrick" wrote in message
...
On 13:07 14 May 2011, Dave Plowman (News) wrote:

In article ,
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.)

Black and blue are the commons. Not that it would make any difference
if you commoned red and yellow.

You can check for sure by unplugging the leads from each actual
earpiece (red and blue plugs), but be careful to pull on the actual
plug only. The pins are of slightly different sizes.

Hope you have a source of the muffs for these - they crumble to dust
quite quickly.

You must know the headphones well because I had long forgotten the leads
plugged into the earpieces. I didn't realize the mini plugs were keyed
to
go in only one way around. With that info I could have continuity tested
the colored leads to each of the larger pins on the plugs but you saved
me
doing that becauase you have given me the color coding too. Thank you.

You're right about the muffs crumbling. I threw them out. First I'll
see
what the cans sound like now and then decide if it's worth getting new
muffs.

It's been instructive to see how many people misunderstood what the
original question was trying to solve and they gave obviously useless, if
not misleading, advice. It's never been the same since Eternal
September.

Actually that's untrue, nobody misunderstood the question or gave useless
or misleading advice. And Phil is quite right, the effect of having the
headphones out of phase with each other is not at all subtle, it is at
least as obvious as it would be with speakers. Just because there is no
phase cancellation in the air doesn't mean that the brain is not
immediately aware of the phase difference heard in the two ears.

David.



+1

Arfa

On Sat, 14 May 2011 13:55:16 +0100, Patrick
wrote:

On 13:07 14 May 2011, Dave Plowman (News) wrote:

(snip)

Hope you have a source of the muffs for these - they crumble to dust
quite quickly.

(snip)

You're right about the muffs crumbling. I threw them out. First I'll see
what the cans sound like now and then decide if it's worth getting new
muffs.

I have Sennheiser HD414's from ~1980. In the last year the muffs have
gone from developing a lasting flat where they rest on a surface, to
literally crumbling.

Sennheiser's national distributor has replacements for $A9 plus
postage. I'm impressed.

In article ,
Patrick wrote:
Black and blue are the commons. Not that it would make any difference
if you commoned red and yellow.

You can check for sure by unplugging the leads from each actual
earpiece (red and blue plugs), but be careful to pull on the actual
plug only. The pins are of slightly different sizes.

Hope you have a source of the muffs for these - they crumble to dust
quite quickly.

You must know the headphones well because I had long forgotten the leads
plugged into the earpieces. I didn't realize the mini plugs were keyed
to go in only one way around. With that info I could have continuity
tested the colored leads to each of the larger pins on the plugs but
you saved me doing that becauase you have given me the color coding
too. Thank you.

They were standard issue (for some things) in the BBC when I worked there
many many years ago

You're right about the muffs crumbling. I threw them out. First I'll
see what the cans sound like now and then decide if it's worth getting
new muffs.

I still quite like them for where an open backed design is suitable.

It's been instructive to see how many people misunderstood what the
original question was trying to solve and they gave obviously useless,
if not misleading, advice. It's never been the same since Eternal
September.

Phil tends to be rude to everyone. And everything to him is black and
white. But I do know out of phase headphones ain't as obvious to all as he
suggests, or are to him.

--
*All generalizations are false.

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

"Dave Plowman (Nutcase)"


Phil tends to be rude to everyone. And everything to him is black and
white.

** My colour vision is perfect.

But I do know out of phase headphones ain't as obvious to all as he
suggests, or are to him.


** Not with a ** MONO ** signal !!!!!!!!!!!!!!!!!!!!!!!!!!!!!

As many others here, with far more insight than a jerk like you, have
agreed.



...... Phil

In article ,
Phil Allison wrote:
But I do know out of phase headphones ain't as obvious to all as he
suggests, or are to him.


** Not with a ** MONO ** signal !!!!!!!!!!!!!!!!!!!!!!!!!!!!!

As many others here, with far more insight than a jerk like you, have
agreed.

You have little idea about the variations between humans. To know this,
you have to be one yourself.

--
*Rehab is for quitters

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

On May 14, 5:07*am, "Dave Plowman (News)"
wrote:
In article ,
* *Patrick wrote:

I have some vinatge headphones (Sennheiser HD424)


Hope you have a source of the muffs for these - they crumble to dust quite
quickly.

Did anyone ever come up with muffs better than the OEM crap for these?
I have two or three bald pair at the back of the cabinet. I ordered
new muffs for one of these, once, at some amazing fraction of the cost
of a new set of headphones. (Hearing I had bought new muffs, a friend
pressed his on me. Frustrated, he had bought Koss headphones.)

On Sat, 14 May 2011 08:19:58 -0700 (PDT), spamtrap1888
wrote:

Did anyone ever come up with muffs better than the OEM crap for these?

Search Google for "disposable headphone covers". Something like
these:
http://www.scansound.com/headphone-covers.htm (towards bottom of
page). Pack them with something soft (foam, tissue paper, rolled
cloth, old rags, etc) and place them over your headphones.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On Tue, 17 May 2011 08:27:28 -0700, Jeff Liebermann
wrote:

On Sat, 14 May 2011 08:19:58 -0700 (PDT), spamtrap1888
wrote:

Did anyone ever come up with muffs better than the OEM crap for these?

Search Google for "disposable headphone covers". Something like
these:
http://www.scansound.com/headphone-covers.htm (towards bottom of
page). Pack them with something soft (foam, tissue paper, rolled
cloth, old rags, etc) and place them over your headphones.

Or, if you're into crochet, you can knit your own:
http://myplasticfreelife.com/2011/04/crochet-your-own-plastic-free-headphone-ear-pads/
http://www.craftbits.com/project/crochet-headphone-covers
http://blog.sewhooked.org/2008/10/29/crochet-headphone-covers-revisisted/
If not, try old socks:
http://www.instructables.com/id/Sockophones-earphone-padding-made-from-socks/

Full disclosu I haven't tried any of the above, but have made some
covers from cloth, elastic, some foam, and with a serger.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

In article ,
"Dave Plowman (News)" wrote:

In article ,
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.)

Black and blue are the commons. Not that it would make any difference if
you commoned red and yellow.

You can check for sure by unplugging the leads from each actual earpiece
(red and blue plugs), but be careful to pull on the actual plug only. The
pins are of slightly different sizes.

Hope you have a source of the muffs for these - they crumble to dust quite
quickly.

I've been making my own for years, out of open-cell foam -- it comes for
free as packaging in all sorts of product boxes.

Isaac

On May 14, 9:07*pm, isw wrote:
In article ,
*"Dave Plowman (News)" wrote:



In article ,
* *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.)

Black and blue are the commons. Not that it would make any difference if
you commoned red and yellow.

You can check for sure by unplugging the leads from each actual earpiece
(red and blue plugs), but be careful to pull on the actual plug only. The
pins are of slightly different sizes.

Hope you have a source of the muffs for these - they crumble to dust quite
quickly.

I've been making my own for years, out of open-cell foam -- it comes for
free as packaging in all sorts of product boxes.

Any tips how? I once bought a Pelican case to hold something
disassembled, and I had a heck of a time cutting cavities in the foam
provided to fit the pieces. Cutting foam into cylinders would be hard
enough -- making them so they can slip over the earpieces seems
nightmarish to me.

In article
,
spamtrap1888 wrote:

On May 14, 9:07*pm, isw wrote:
In article ,
*"Dave Plowman (News)" wrote:



In article ,
* *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.)

Black and blue are the commons. Not that it would make any difference if
you commoned red and yellow.

You can check for sure by unplugging the leads from each actual earpiece
(red and blue plugs), but be careful to pull on the actual plug only. The
pins are of slightly different sizes.

Hope you have a source of the muffs for these - they crumble to dust quite
quickly.

I've been making my own for years, out of open-cell foam -- it comes for
free as packaging in all sorts of product boxes.

Any tips how?

Start with a piece of open-cell foam about 1/2" thick.

In a piece of 1/8" thick stiff material (I used Masonite), cut a round
hole a bit smaller than the diameter of the headset drivers (this will
allow the foam to stretch slightly when you install the pads, so it'll
stay in place).

Put the masonite on the foam and press it down hard (use clamps). The
foam will bulge up in the hole.

With a very sharp small-bladed utility knife, cut around the hole to
free the foam so it stands up in a straight-sided cylinder. Be careful
not to cut all the way through. Then slide the blade across the hole
while using a sawing motion. This will cut off the middle part of the
foam.

Now, you should have a piece of 1/2" thick foam with a circular part in
the middle which is 1/8" thick. Trim the outside to a circular shape, a
bit larger than the drivers.

Of course, you can use a different thickness of masonite to control the
thickness of the foam where the sound comes through, if you like a
"softer" fit on your ears.

Isaac

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.)

From my years of tinkering with old stereo headphones as a teenager, I'm
going to confidently guess:

Black - Left Ground/-ve
Yellow - Left +ve

Blue - Right Ground/-ve
Red - Right +ve


Martin

On Sat, 14 May 2011 22:33:49 +0100, Fleetie
wrote:

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.)

From my years of tinkering with old stereo headphones as a teenager, I'm
going to confidently guess:

Black - Left Ground/-ve
Yellow - Left +ve

Blue - Right Ground/-ve
Red - Right +ve


Martin

Sounds right.

RL

"legg"


Sounds right.


** The OP's headphones are not right until they do.



..... Phil

"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

Artemus 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.)


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


But!, Are the ears in phase? :~j

Jamie

"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