13W7 wiring problem

[Fakecodename47 10+ year member]

I have a 13W7 which is 1.5 dual voice coil. If I wire it in parallell then I get a reading of about 0.8 ohms, which makes sense becase it should be 0.75 omhs. When I wire it in series im getting a reading of 1.5 oms. I can not figure out why this is happening. When I do a reading on each voice coil im getting a reading of 1.5 so they both seem to be working. I even took another one of my subs and wired that to make sure I was doing it right and that read correctly. Anyone ever heard of this happening?

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[Buck 5,000+ posts]

I have a 13W7 which is 1.5 dual voice coil. If I wire it in parallell then I get a reading of about 0.8 ohms, which makes sense becase it should be 0.75 omhs. When I wire it in series im getting a reading of 1.5 oms. I can not figure out why this is happening. When I do a reading on each voice coil im getting a reading of 1.5 so they both seem to be working. I even took another one of my subs and wired that to make sure I was doing it right and that read correctly. Anyone ever heard of this happening?

Maybe you didn't hook your wires up correctly and it was only reading 1 coil.

 

[Fakecodename47 10+ year member]

Im gonna go try it again right now. I tried it about 6 different times even using different wires to make sure there wasnt a problem with one of the wires I was using. I can not figure out what they heck is wrong here. If I cant find out what is wrong should I try running it at 1.5 ohms?

 

[Fakecodename47 10+ year member]

After trying to wire it again I found something odd. On my sub that is reading correctly, When I hook the positive end of the meter to the poisitve on the one coil and the negative of the meter to the negative of the other coil I do not get a reading. When I do it with he 13W7 I get a reading of 1.5. Just to clarify when I am taking these reading I am not wiring the coils together. Thats why it seems odd that I am getting a 1.5 reading from two coils not wired together.

 

[Pataforce8 10+ year member]

You must have a short somewhere.

 

[Fakecodename47 10+ year member]

Is there a way I can test that? I had it hooked up to an amp and it was working. I thought it was running at 3 ohms and was wondering why the amp was overheating but it must have been at 1.5 ohms and the amp was only 2 ohm stable so maybe thats why it was over heating.

 

[thevic24 5,000+ posts]

Bad coil??

If the coils are reading correctly wired every way but in series, ????

got me.

 

[thevic24 5,000+ posts]

Is there a way I can test that? I had it hooked up to an amp and it was working. I thought it was running at 3 ohms and was wondering why the amp was overheating but it must have been at 1.5 ohms and the amp was only 2 ohm stable so maybe thats why it was over heating.

Do a test run using one coil at a time. Just hook it up free air and see if the both work bye them selves.

See if the have the same output and motion of each other.

 

[Fakecodename47 10+ year member]

Coils are each reading 1.5 when tested by themselves. If wired in parallel its reading about 0.8. I also just ran my positive on my meter to the positive on the one coil and the negative from the meter and the positive of the other coil and still got 1.5 ohms. I did the same thing with using the two negatives as positive and negative and got 1.5. so even if I only wire the two negatives its reading as 1.5 ohms. I have continuity between all four terminals.

 

[Pataforce8 10+ year member]

That's interesting. Have you looked really closely? I can't imagine that the short would be somewhere that you couldn't see it.

 

[Fakecodename47 10+ year member]

I tried checking but the only part where the wires are exposed is where they are soldered to the terminals and they looked fine there.