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Blown Yet Not Blown Speaker
I've gone through something of a minor nightmare since installing a pair of new Rockford Fosgate Punch series speakers in my Corolla. The speakers are the newest Punch series They were fine for a weak, then the left/drivers side started to sound like it was blown. My first thought was it was touching the speaker deck cover; took it off and the issue remained. The surround is mounted correctly. So my next thought is it somehow was blown. But here is the catch; sometimes it doesn't, sometimes it won't. Feeling the very top/rubber part on the outside of the cone when ti is doing it, the cone just stops moving like it's loosing the signal.
The head unit is a 7 month old JVC KD-S25. Not their top product, not quite their cheapest. Now here is where it gets weird; if I take the face plate off, blow it off the contacts and spray a little contact cleaner it will work fine for a few days. I almost never take the face plate off and the contacts look fine. While I plan to test the connections to the car's wire harness because I'll have to pull out the head anyway if it needs to be fixed under warranty, I kinda doubt that is the issue.
The only other possibility I plan on checking is if when I went to put larger connectors on the wires on the car's speaker mount (the contacts on the speaker are bigger than normal) is that my solder joint wasn't good (unlikely; I have a lot of experience soldering electronics in guitars and instrument amps, which are a LOT higher voltage than a car sterep and never had a problem) but something I think I'll test.
Anyone else have any other ideas outside of what I've suggested (and switching the speakers around of course)? This has just driven me up a wall. I've ruled out a blown speaker because a blown speaker stays blown sounding in my experience...
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