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Old Jun 7, 2003
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Question Ohm question

Since I am running two 4 ohm subwoofers in phase and two 4 ohm Subwoofers out of phase, what is the total ohm count of my subs...1 or 2 ohms? Does the ohms change with having two speakers out of phase?
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Old Jun 7, 2003
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parrallel is the two speakers (X x Y) divided by (X + Y)

series is the two speakers added X + Y

So you have (4 + 4) x (4 + 4) divided by (4 +4) + (4 + 4)
8 x 8 divided by 8 + 8
64 divided by 16 = 4

You would connect terminal + of subwoofer A to amp positive
terminal - of subwoofer A to + of subwoofer B
terminal - of subwoofer B to amp negative
terminal + of subwoofer C to amp positive
terminal - of subwoofer C to + of subwoofer D
terminal - of subwoofer D to amp negative

Provided that they are wired to the amp in mono mode
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Old Jun 7, 2003
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Huh

I have 4 subs wired in parrallel with two in phase and two outta phase
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Old Jun 7, 2003
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Phase has nothing to do w/ ohms when wiring.

The real question is why would you run some in and some out of phase. I know it will be a good answer .... haha
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Old Jun 7, 2003
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Originally posted by Regularjoe
The real question is why would you run some in and some out of phase. I know it will be a good answer .... haha
Joe, check out the pics below in my Member ride's section and tell me if you can figure it out
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Old Jun 7, 2003
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I'd assume it's because of the Isobarik configuration he's using?
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Old Jun 7, 2003
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arr, you reply to damn fast
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Old Jun 7, 2003
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...you gave it away Ed
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Old Jun 7, 2003
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Originally posted by Ed
arr, you reply to damn fast
haha!
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Old Jun 7, 2003
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Joe is correct, phase has nothing to do with the impedance. Since two of the speakers are backwards, then they are wired backwards. So all that is changed is the direction of the woofer's throw.

You would connect terminal + of subwoofer A to amp positive
terminal - of subwoofer A to - of subwoofer B
terminal + of subwoofer B to amp negative
terminal + of subwoofer C to amp positive
terminal - of subwoofer C to - of subwoofer D
terminal + of subwoofer D to amp negative

This would yield a 4 ohm load
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Old Jun 7, 2003
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Forgot about that project. The box turned out good.
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Old Jun 7, 2003
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Originally posted by Regularjoe
Forgot about that project. The box turned out good.
Thanks! I was gonna mount my amps how you did on a seperate piece of wood...but I got tired of working on the box and to lazy to cut out and carpet another piece of wood...I want to try a fiberglass amp rack as my next project.

anyway, I think there is a simple answer to my question somewhere in one of these replies

...and Rickinthescv, they are dual 8 ohm subs
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