When repairing the subs should you use a low frequency sine wave or just feel for the sweet spot? If you use a low frequency tone what are you using? These are two ohm speakers so don't want to run them off an 8 or 4 ohm amp.

 

I have no idea what you are talking about. What has worked for many of use is this simply fix; bang for the buck

 

I think he meant center cones but still makes no sense.

 

I have no idea either but your answer is not what he is asking — well, I don’t think so anyway.
When I added my new head unit I split my audio wiring into four separate zones at the OEM amplifier using the RCA plugs on the head unit.
I thought ought these OEM speakers were 4 Ohm speakers. But there again I know next to nothing about this audio ****.

 

I believe this is what he is talking about. The second time I fixed my subwoofers I had one of them still rubbing from not being centered exactly even though they didn’t rub after the glue dried until it played music.

 

I believe you hit the nail right on the head!


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OP here. So yes talking about putting new foam surrounds on the subs. You can run a low frequency signal to center the cone or like the video feel for the sweet spot. My question was how to safely send the low frequency signal to the speaker since it is 2 ohm. 8 ohm amp to a 2 ohm speaker is a mismatch. Shouldn't run higher ohm amp into a lower ohm soeaker. Probably could safely run off an 8 ohm amp low volume. I didnt want to pull the stock wiring to be able to do this in the car.

Anyway I ended up doing it like everyone else just like the video. Found sweet spot and did the trick.

 

I used some paper shims to center the cone. Worked fine. Keep it simple.