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Registered Member #1412
Joined: Thu Mar 27 2008, 04:07PM
Location: Taipei Taiwan
Posts: 278
Many audiophile believe that speaker cable have to be installed in a specific direction or its performance will be affect.Is this true or this is another pseudoscience claim?
What I cannot understand is that if it will work not as good if current is flowing in another direction,since audio signal is AC,I think half of the waveform will be affected no matter how I connect it.
Or this claim is in fact based on solid evidence or has sensible science explanation?
Registered Member #3637
Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
It's because when one speaker has a + signal of the AC, and the other the negative, both speakers will not be moving in relation to eachother.
Think of one moving out, and the other in. Since they're technically pushing air, the sound would be greatly diminished as a result. It's actually how they can reduce excessive noise in some car exhaust systems. They take the sound of the exhaust, and put a speaker in there with a 180 degree phase shift, canceling out the noise.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
hsieh wrote ...
Many audiophile believe that speaker cable have to be installed in a specific direction or its performance will be affect.Is this true or this is another pseudoscience claim?
What I cannot understand is that if it will work not as good if current is flowing in another direction,since audio signal is AC,I think half of the waveform will be affected no matter how I connect it.
Or this claim is in fact based on solid evidence or has sensible science explanation?
It is nonsense to trick you into paying a lot of money. But you must still make sure that stereo speakers are wired up correctly as to phase, or they will tend to cancel each other out, especially at low frequencies.
Registered Member #72
Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
It has a sensible social science explanation. The more hocus pocus the lads in the audio shop can surround ordinary copper with, the more they can intimidate you into thinking that they know more about audio than you, so the more they can charge you for their snake oil.
At the level of the speaker system, there is absolutely no difference.
It might start making a difference if it was coax, and there was a strong interfereing radio signal nearby, and the outer was grounded so protected the amplifier from receiving the interfereing signal.
Now you absolutely *do* need to get both speakers phased the same way, doesn't matter which way, as long as it's the same. The easiest test for this is play a mono signal with the two speakers facing each other, the middle and bass will vanish if they are opposite polarity.
A girl at work a while back asked me if there would be any difference if she bought the 89 strand linear crystal oxygen free copper speaker leads, or 2.5mm2 twin'n'earth solid core mains cable. I replied that there would be a huge difference, because if she bought the twin'n'earth, she'd be able to afford another 100 CDs.
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Speaker cable has "polarity"?
