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In Reply to: RE: 1.6QR phasing posted by pistonengine08 on April 24, 2014 at 09:01:45
So what I didn't mention in the original post was that when I rewired them yesterday, I looked at the schematics I make before I unwired, and it looked out of phase! I was convinced when I originally bi amped the speakers I messed up and they've been out of phase all along!
So when I had everything hooked up last night, they sounded good but something was off. The factory did a full new Mylar job, so I was thinking break in, but in the back of my mind was phase.
We'll turns out my original wiring job and schematics was correct, but damn I keep looking at it physically and it looks wrong. On one speaker, the positive terminal (from the amp) go up the voice coil wiring on the outsides, and one the other it goes on the inside and the ground from the outsides. Maybe in that speaker they put the magnets in backwards!! :D
Anyways I did the test above and also this helpful page helped me.
http://www.richardfarrar.com/are-your-speakers-wired-correctly/
Soundin' perty magnificent right now!
Also, listening to a straight 600hz tone sucks
Follow Ups:
So you figured it out? right?
Yep, all's well that ends well.
The wiring on the left and right speakers are mirror images of each driver other so +- -+ on one side becomes -+ +- on the other. It confuses everyone but Magnepan :). Enjoy!
Edits: 04/24/14 04/24/14
No, actually that's still not correct. It does really get confusing, but it depends upon whether you're considering the transducer polarities only or the related wiring as well.
If you're just looking at the bottom of the transducers themselves and you have no wiring/components connected then it looks like this:
+ - + - + - + -
You can confirm this visually by looking at the traces as they lead out of the connectors and head up to the mylar. None of them cross over each other and both tweeter and woofer "circulate" in the same direction. So, tweeter and woofer would both move the same direction if voltages connected the way I represented.
When you include the related wiring (this is where the tweeter polarity reversal happens) then it gets confusing.
In that case you'd end up with something that looks like this: (As you noted.)
+ - - + - + + -
I labeled pluses and minuses here arbitrarily. They could be represented (all eight connections) in opposite polarity as well.
Cheers,
Dave.
lol I'm still confused. I look at the driver and can't fathom why wiring like that results in movement in phase.
It operates on essentially the same principles as electric motors. Since I've always done poorly academically on motor theory, and could never master the right hand rule, perhaps it's not shocking I don't get it :D
I had problems with the right-hand rule when I was a freshman in college too. I was busy using my right hand for things other than physics :).
It just confused you too. :) Take another look please.
Cheers,
Dave.
I must have caught my error at the same time you did, hence the edit. :)
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