what bad polarity can do?

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sublinux

Copper - Posts: 83

Joined: September 07, 2008

Location: Quebec, Canada

Posted: March 07, 2009 at 12:01 PM / IP Logged

What bad polarity can do? How do you know when polarity is bad? What is the symptom?

haemphyst

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Joined: January 19, 2003

Location: Michigan, Bouvet Island

Posted: March 07, 2009 at 12:37 PM / IP Logged

Polarity? Do you mean connecting the negative terminal of an amplifier to the positive terminal of the speaker? Nothing will happen. The speaker will work as designed. With one speaker, you won't be able to hear incorrect polarity, but with two, there will be a distinct loss of (in the case of multiple subwoofers) bass and focality (in the case of full-range speakers). If both are wired "out of phase" it, again, will be inaudible.

Now, if you mean "polarity" as in connecting a POWER SOURCE like a battery backwards, you COULD completely destroy the device being POWERED, like a deck or amplifier, if the safety devices (i.e. fuses) are bypassed, removed, or over-rated.

It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

sublinux

Copper - Posts: 83

Joined: September 07, 2008

Location: Quebec, Canada

Posted: March 08, 2009 at 12:24 AM / IP Logged

Well, i was talking about speaker.. so if in my car rear speaker (Both 6x9) one got a good polarity and the other have a bad one the sound will be "lazy" ?

forbidden

Platinum - Posts: 5,352

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Joined: November 01, 2003

Location: Alberta, Canada

Posted: March 08, 2009 at 12:53 AM / IP Logged

No, it causes one speaker to move in the opposite direction. This primarily shows itself as a loss of bass response. If you are unsure of it, try reversing the leads on one speaker and listening to it, then reverse it back again.

Top Secret, I can tell you but then my wife will kill me.

i am an idiot

Platinum - Posts: 13,670

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Joined: September 21, 2006

Location: Louisiana, United States

Posted: March 08, 2009 at 9:26 AM / IP Logged

The easiest way to check for proper phasing is to balance to left and then balance to right. If there is bass when either speaker is playing alone, and no bass when balance is in center, one of them does not have proper polarity.

You must turn off all other speakers in the vehicle to properly perform the above procedure.

sublinux

Copper - Posts: 83

Joined: September 07, 2008

Location: Quebec, Canada

Posted: March 08, 2009 at 4:27 PM / IP Logged

Thanks! I just fix my front speakers!

KarTuneMan

Platinum - Posts: 7,056

Joined: December 14, 2004

Location: Isle Of Man

Posted: March 08, 2009 at 8:34 PM / IP Logged

sublinux wrote:

Thanks! I just fix my front speakers!

what about the rears???

sublinux

Copper - Posts: 83

Joined: September 07, 2008

Location: Quebec, Canada

Posted: March 09, 2009 at 9:31 AM / IP Logged

The rears was alerdy good :P Now i got bass from the front WOOT!

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what bad polarity can do?

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