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Old 06-24-2014, 07:58 PM
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Stock speaker polarization issue.

I'm in the proccess of upgrading the speakers in my 2012 with Focal iss 690's. I went to the WK2 site and wrote down all color codes for the stock wiring harness for both positive and negative leads. However, when I went to check the polarization of the stock speakers nothing matched. For example the wiring diagram shows FR+ being Violet and FR- being Yellow. Yet the stock speaker is reversed. The center speaker has the same issue also. I can't confirm the tweeter, but rest are all reversed. To complicate matters more, the harness adapter provided by Crutchfield aligns with the wiring diagram and not the stock speaker configuration. Thus, if I did a speaker swap using their adaptor or following the wiring diagram, the new speakers would be phases 180 degrees from the stock speakers.

So something is definately wrong here.

1. The wiring diagram is right and all the stock speakers are all out of phase.

or

2. The stock system is phased correctly and the wiring diagram (and harness adapter) are wrong. Which means that anybody who did a plug and play swap is 180 degrees phased out to rest of the speaker system which is probably worse than just leaving it stock.

For now I am matching the stock speaker setup and leaving the door panels off until I get get some clarification on this. Hopefully somebody here has some more insight on this issue.

MB
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Old 06-24-2014, 09:15 PM
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Re: Stock speaker polarization issue.

Greetings,

It is possible that both the stock 6x9 and center channel speakers are out of phase on purpose in order to set the delay correctly. It is an old trick that is works. In very simple terms, by setting the delay sequence and finding a generic spot that is acceptable to everybody, they caused a cancellation effect between these speakers. To solve it, you simple put them out of phase and you get it back.

Since you have the panels off for now, install it the correct way and listen. Then install it out of phase and compare which one you like better. Remember, you are introducing a new speaker, so the factory settings might not apply to you.

Best for now.
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Old 06-24-2014, 09:39 PM
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Re: Stock speaker polarization issue.

The tweeter wires are

Orange Stripe(+) I say this because that wire was feeding the crossover.
Yellow Stripe (-)

The tweeter with the 690 seem to reverse phase too.

The wire with red (+) changes over to the blank wire under the heat shrink of the cross over.

You can use the phasing of the focal cross over (remember the focal uses an inverted dome)

What I did was shorten the tweeter wire soldered in the crossover to the clear wire and used that as my positive which matched up to the OEM wires with the orange stripe.
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Old 06-25-2014, 01:44 PM
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Re: Stock speaker polarization issue.

Why a manufacturer would purposely reverse the polarity of any or all the speakers is just baffeling. Speaker polarity matters a great deal in sound imaging and lower frequencies. The human ear cannot easily pick up a reversed polarity of a single speaker, but get two or more out of phase and the sound quality degrades noticably.
For example, imagine when you hear a kick drum. One speaker with correct polarity will momenaraly push out and the other speaker that is out of phase will momentaraly pull in. This will create equal but opposite sound waves thus trying to cancel each other out. This website has some interesting test tone that purposely put the left and right speaker in and out of phase so you can hear the difference.
http://www.audiocheck.net/audiotests_polaritycheck.php


So this brings me back to the question: Is the wiring driagram and harness adapter provided by Crutchfield wrong, or are the stock speakers wired reveresed polarity?


Further investigation led me to this app.
https://play.google.com/store/apps/details?id=com.dwa_ict.polaritychecker&hl=en
Not having much faith in this app I though I would give it a try anyway. I sent the test click to the head unit via bluetooth and started testing all the stock speakers.
Every speaker so far was showing correct polarity. I then tested the one installed Focal woofer that is currantly wired the same polarity as the stock speaker (opposite the wiring diagram) and it too showed correct polarity. Next was the Focal tweeter that is wired according to the diagram. An wouldn't you no it, the app showed revered polarity. Still not trusting this app I decided to reverse the wiring and retest. Well I'll be darn if that little app didn't detect correct polarity. I'm still not 100% relying on this app, but so far it seems to be accurate. I would like to test with a CD instead of going through blutooth to see if that makes a difference.


Please note that I may be an EE but I am in no way an audio enginineer so please don't bust my chops if I mistated anything.


The only thing I can gather at this point is that the stock configuration is correct and the wiring diagram and harness adapter are wrong.

Hopefully there are some audio guru's out there that can chime in on this. I want to get this right before I go any further.

MB
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Old 06-26-2014, 07:57 AM
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Re: Stock speaker polarization issue.

I think you are over complicating this whole process for yourself

You are just upgrading/replacing the speakers.

You are still bound by whatever signal the head unit produces and the amp distributes.

I was a bit confused with the tweeter hook up myself and I hooked it up one one then I reversed the wires and I really could not find a noticeable difference in sound at the time because they need to be played for a while before they season in and sound proper.


So just just ended up sticking with the premise that the crossover was place on the positive wire and left it as that.

I hooked up everything and it sounds better. You have a 50/50 shot of getting it right or wrong the first time. Hook them up let them play in for a while and if you need to go back and fine tune you can always do that.

If you have the wire adapters for the woofer just match them up and plug it it.

You do have to improve for the tweeter.

My advice for the tweeter is use the cross over. So if you are going to used the Focal wiring

Hook up wire labeled display so it bypasses the protection resistor (it is not needed if you are not going to power with an aftermarket amp)

The resistor is just going to sap more power when playing for a prolonged time and you will find yourself cranking the volume to maintain the same volume level because of the resistor.
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