Testing that speakers in phase?
 

On 2 May, 20:27, Terry Pinnell wrote:
"Michael Chare" wrote:
"Terry Pinnell" wrote in message
.. .
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?

(I have some cable extensions to do on the speakers that came with my
new PC, and both wires are identical, so I want to be sure I get it
right.)

--
Terry, East Grinstead, UK

I'd use an electrical meter (or light bulb and battery) to work out which
wire was which.

I marked one of the two identical black wires with spots of Tippex,
about 2 cm apart. So, when cutting and inserting an extension pair, I
could be sure I preserved the original status. To my untrained ear
they sound OK, but I will get around to a more rigorous test later.

BTW, I've found that some software doesn't play the rear speakers in
this 5.1 configuration.

--
Terry, East Grinstead, UK- Hide quoted text -

- Show quoted text -

You can check with a 1.5v battery if you can see the cones of the
speakers, connect the battery to the speaker wires one way and the
cone will move in, the other way and the cone will push out but don't
keep the batt on for too long though.
Trevor

Testing that speakers in phase?
 

In article
,
Trevor Smith wrote:
You can check with a 1.5v battery if you can see the cones of the
speakers, connect the battery to the speaker wires one way and the
cone will move in, the other way and the cone will push out but don't
keep the batt on for too long though.

Just to add convention has it if the cone moves out the battery is
connected correctly - ie positive to positive.

--
*What am I? Flypaper for freaks!?

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

Testing that speakers in phase?
 

Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?

(I have some cable extensions to do on the speakers that came with my
new PC, and both wires are identical, so I want to be sure I get it
right.)


Next time, buy better cables :) good cables are marked....

--
Bedankt, Thanks,

The Fug.

VoIP/SIP switched by: www.mysipswitch.com
(A free service sponsored by www.blueface.ie)

Testing that speakers in phase?
 

Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?

(I have some cable extensions to do on the speakers that came with my
new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED :) play music at low level, while placing
led over connections, LED can only light up at one way connection
position....

--
Bedankt, Thanks,

The Fug.

VoIP/SIP switched by: www.mysipswitch.com
(A free service sponsored by www.blueface.ie)

Testing that speakers in phase?
 

Bitstring , from the
wonderful person TheFug said
Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?
(I have some cable extensions to do on the speakers that came with
my
new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED :) play music at low level, while
placing led over connections, LED can only light up at one way
connection position....

That makes the rash (especially with cheap speakers) assumption that the
speaker connections are hooked up to the internals the same way in both
cases. Much safer to actually test the sound output (or, as someone
said, to see which way the cone moves with a DC source).

--
GSV Three Minds in a Can
11,517 Km walked. 2,259 Km PROWs surveyed. 40.9% complete.

Testing that speakers in phase?
 

TheFug wrote:

Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?

(I have some cable extensions to do on the speakers that came with my
new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED :) play music at low level, while placing
led over connections, LED can only light up at one way connection
position....

Just how big an idiot are you ?

Graham

Testing that speakers in phase?
 

GSV Three Minds in a Can wrote:

Bitstring , from the
wonderful person TheFug said
Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?
(I have some cable extensions to do on the speakers that came with
my
new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED :) play music at low level, while
placing led over connections, LED can only light up at one way
connection position....

That makes the rash (especially with cheap speakers) assumption that the
speaker connections are hooked up to the internals the same way in both
cases. Much safer to actually test the sound output (or, as someone
said, to see which way the cone moves with a DC source).

Audio is AC you blithering loonies. No way can an LED inducate
polarity/phase.

Graham

Testing that speakers in phase?
 

Bitstring , from the wonderful person
Eeyore said


GSV Three Minds in a Can wrote:

Bitstring , from the
wonderful person TheFug said
Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?
(I have some cable extensions to do on the speakers that came with
my
new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED :) play music at low level, while
placing led over connections, LED can only light up at one way
connection position....

That makes the rash (especially with cheap speakers) assumption that the
speaker connections are hooked up to the internals the same way in both
cases. Much safer to actually test the sound output (or, as someone
said, to see which way the cone moves with a DC source).

Audio is AC you blithering loonies. No way can an LED inducate
polarity/phase.

It can if you play REALLY low frequency music. 8.

--
GSV Three Minds in a Can
11,517 Km walked. 2,259 Km PROWs surveyed. 40.9% complete.

Testing that speakers in phase?
 

GSV Three Minds in a Can wrote:

Eeyore said
GSV Three Minds in a Can wrote:
TheFug said
Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?
(I have some cable extensions to do on the speakers that came with
my new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED :) play music at low level, while
placing led over connections, LED can only light up at one way
connection position....

That makes the rash (especially with cheap speakers) assumption that the
speaker connections are hooked up to the internals the same way in both
cases. Much safer to actually test the sound output (or, as someone
said, to see which way the cone moves with a DC source).

Audio is AC you blithering loonies. No way can an LED inducate
polarity/phase.

It can if you play REALLY low frequency music. 8.

NO

Testing that speakers in phase?
 

Bitstring , from the wonderful person
Eeyore said


GSV Three Minds in a Can wrote:

Eeyore said
GSV Three Minds in a Can wrote:
TheFug said
Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?
(I have some cable extensions to do on the speakers that came with
my new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED :) play music at low level, while
placing led over connections, LED can only light up at one way
connection position....

That makes the rash (especially with cheap speakers) assumption that the
speaker connections are hooked up to the internals the same way in both
cases. Much safer to actually test the sound output (or, as someone
said, to see which way the cone moves with a DC source).

Audio is AC you blithering loonies. No way can an LED inducate
polarity/phase.

It can if you play REALLY low frequency music. 8.

NO

Sure it can. You just need something around 0.1hz.

--
GSV Three Minds in a Can
11,517 Km walked. 2,259 Km PROWs surveyed. 40.9% complete.