does the cone snap back into it's regular resting position or does it stay where you pushed it when you hear it scrape? usually that sound indicates a blown voice coil. what you hear is the unravelled coil scraping against the magnet structure.
it pops back up when I press it down but it does make a scraping sound. Anyway to examine the coil and see if its broken other then the sound it makes? I think I may have played them to loud with stock HU power !
you'll need to use a digital multimeter. test DC resistance across the good speaker, then compare that to the reading on the "bad" one. see if they are exactly the same. If the bad one is blown or the coil is damaged, you'll probably see a lower resistance, unless the coil is somehow unraveling, but not causing any type of a short inside the speaker. In that case it'd still probably read a matched resistance to the good speaker.
i have the same problem. but it only happens when i push on the bottom of the cone. and it sounds likeits brushing something. but it plays fine when im hitting the lows. what kind of sub is it.
any speaker can make this sound if the cone is pushed on one side or unevenly. it's the sound of the coil windings rubbing against the inside of the magnet structure. doing this too much will damage the speaker, too. that's why it's recommended you not push on speakers if you can avoid it.
Generally when a sub is blown an immediate sign that it is blown is that it will have a strange odor around the magnet. If you blown it really bad the smell will be in your car for awhile.
not always the case though. if it's a sealed box, the sub's coils are sealed inside the enclosure, and the air is trapped there.. no air, no smell. Although I don't recall if Mallory ever mentioned if this is indeed a sub we're talking about, or a component speaker.
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